As introductions went, it was unusual, to say the least, though a week after Tessa had moved into the upper flat, her and Keith's paths finally crossed.

"We meet at last," Tessa said with a smile, though she noticed that Keith seemed distracted as he introduced himself.

Keith did his best to appear casual as Tessa smiled at him, though the very tight T-shirt she wore, bearing the message 'Very Naughty Tessa- Horny When Hot,' didn't help his efforts at all.

Seeing Keith blush prompted Tessa to apologise to him immediately. However, she found his reaction to seeing her nipples straining beneath her tight-fitting attention-seeker sweet.

"I'm sorry for startling you with my outfit, but I just grabbed the first thing I could find," Tessa explained.

Keith told Tessa she didn't need to apologise, though she said the least she could do was ask him to join her for coffee and a chat. Keith accepted the invitation without hesitation.

Tessa discovered that Keith had retired from work for health reasons and was living a quiet, solitary life, with escapist writing often filling his days.

"I've turned sixty now, so I try to set achievable goals," Keith joked.

Tessa was very interested in what she had heard and smiled as she explained that she worked at an art gallery. She also told Keith that she relaxed by creating art with a group of friends she'd studied with a few years earlier.

"We all have to pretend to be grown-ups in the real world, so we make sure to enjoy ourselves outside it," Tessa said with a mischievous giggle.

During their chat, Tessa said she'd show Keith the nearby studio she and her friends used the next time everyone got together. Keith accepted the invitation, though he admitted he knew very little about art and culture.

"We're definitely not the stereotypical art crowd, I promise you. That would be true even if I weren't sitting here with my tits straining beneath a tight T-shirt that's telling you all about me!" Tessa laughed.

"I'm sure there's more to everything than you squeezing your tits into a tight T-shirt, but as a marketing strategy, if it's meant to make a stranger want to explore the topic further, it's worked for me," Keith said, drawing a theatrical wink from Tessa.

When it was time to introduce the project she and her friends were working on, Tessa decided that straight talk was the best approach.

"Our latest art is called 'Five Decades Of Sex.' We've already completed four elements and have one left to create. It will focus on those aged sixty and over. The final element might differ from the others for practical reasons. The completed segments have featured our group covering each other with body paint and having fun on a large white sheet that becomes a canvas after everyone's rolled around and done lots of sexy things on it. You can't beat bodily fluids if you want to make paint do crazy things when people are having fun wearing it," Tessa said with a smile.

Having already told Keith that the final element of the project would be handled differently, Tessa decided to share more details.

"One of us will sit with our over-sixty volunteer and watch the rest of the group have a sexy time together on the canvas as the paint they're wearing forms its patterns. For our final element, our volunteer will apply his erotic output to a black canvas, with gentle interventions from whichever artist has taken on these duties. Does any of this make sense to you? I won't be offended at all if it doesn't," Tessa said to Keith, watching his expression to gauge his reaction.

"This would sound very interesting in any context, but when I'm hearing it all from a young woman sitting beside me, ready to burst out of her sexy top, it's a compelling listen," Keith joked.

Tessa explained that if Keith agreed to participate, she would be his assistant. She also said that if her neighbour agreed to represent the over-sixties in the project, the two of them could spend the days leading up to painting day figuring out the most fun ways for her to help him paint the best possible picture.

After listening to Tessa, Keith told her she could tell her fellow artists that she'd found the help they needed for the project. However, he also explained something he felt Tessa needed to know.

"I don't know when you were planning the first session of preparatory work, but thinking about it is making my balls ache," Keith said, laughing.

"We'll have a practice run after I've sent a message in the group's private chat to spread the word. That sounds like a good plan to me," Tessa said, taking out her phone.

Enjoying themselves to the sound of a phone pinging with reply alerts was a new experience for Keith. He wasn't sure whether it was for Tessa, too, but she chose to focus on other matters.

"I think hard and fast will work best when you're painting, so we'll have a practice session on that shortly. I'll get you used to how I roll when I need to uncork urgently first, so you'll be able to share the pleasure of giving, too," Tessa explained.

Keith smiled at what he'd heard, but offered some insight of his own before Tessa began her coaching session.

"Watching a sexy lady have fun by herself will be enough to get my brush gliding. Helping her meet her needs will, too. I'm not trying to put you off from pulling as hard and as fast as you like on me; I just need you to know that seeing you squirm and giggle will work just as well, unless I'm flagging a bit!" Keith explained.

"I don't suppose everyone will believe me, but that's one of the sexiest things anyone's said to me that I can remember!" Tessa replied, deciding not to waste any more time before dealing with her intense arousal.

As Tessa plunged her fingers into her body, she could see the delight in Keith's eyes. She'd been on the brink just from hearing his words, and she was now wriggling with pleasure.

"I know what you said, but kneel beside me, and I'll be your canvas this time," Tessa gasped.

Tessa managed to utter her words seconds before her climax ignited. It did as she pulled firmly and quickly on Keith's cock, sending cum over Tessa's body as she squealed loudly.

Tessa enjoyed her first encounter with Keith and was happy to confirm that.

"I don't think you'll have stage fright on performance night, based on that. I'm sure whoever's fingers are busy inside me, I'll have a wonderful time either way," Tessa said contentedly.

Once Tessa had satisfied her needs and grown more familiar with Keith's cock, she looked at the messages in the chat group that had been posted in response to her own. Everyone except a couple of members had replied, and the responses were all positive. It felt like the perfect end to a memorable day.

***

After a pleasant sleep, Tessa checked her messages before heading to work. She had received more replies overnight, confirming that the entire group planned to attend the event. All agreed that accommodating thirteen people in the studio, with eleven on the floor, was feasible, but the main topic was Tessa's recruitment of Keith.

A busy work schedule made Tessa's day fly by, while Keith worked on a story he planned to finish in the next few days. Reflecting on the previous evening helped Keith creatively, and by the time Tessa visited him, he was already feeling positive about life.

"What delivishness are you going to teach me the finer points of today, or are there matters I have to take seriously and attend to?" Keith asked after Tessa sat beside him on his sofa.

"We've hit a minor problem. Jessica's back's acting up, so we're missing an artist. She's desperate to be part of everything, so she'll still be here, but she'll have to watch from the sidelines. I think I'm more upset about her missing out than she seems, but she's probably putting on a brave face for everyone else's sake," Tessa explained.

Keith knew his participation in the event was determined by practical considerations, and that Tessa had repeatedly stressed she didn't feel she was missing out by being his willing assistant. However, what he had just heard immediately gave him an idea.

"I've stumbled into all of this by accident. I'm no expert in any of it. I'll understand if you say it's unworkable, but if a cheeky novice wrote a story about a night like the one about to take place and Jessica read it, do you think that would make her feel as much a part of everything as everyone else? I'm asking because you've given up your spot on the canvas, so perhaps you're well placed to offer an opinion?" Keith said to Tessa as she sat beside him.

"I'm going to call Jessica right away. Even if she's not interested in your offer, I'll remember you made it whenever I think about 'Five Decades Of Sex.' You've seen my horny side, but I'm a big softie, too. I won't forget this moment, no matter what happens," Tessa said, picking up her phone from the table and calling her friend.

After her conversation with Jess, Tessa set her phone down and smiled at Keith.

"Jess wants you to know she accepts your offer and that she's as shocked and delighted as I am," Tessa explained.

Keith was eager for Tessa to understand that, as an enthusiastic amateur writer, he might not match the level of professionalism Jess was accustomed to. His observation prompted Tessa to make a comment she considered important.

"If Jess reads what you've written, she'll have the bigger picture in mind, just as I will when I'm helping you. Everyone will love you to pieces when they discover your additional role in the final chapter, and it will be the first thing I mention that night. If you're struggling to put something together, don't worry; just doing your best will mean the world to us all," Tessa explained.

Keith's story centered on Tess, Jessica, and the rest of the group they were part of. It was a fictional account of the project's final element. The focus was on togetherness and overcoming obstacles. It invited the reader to draw on memories of treasured moments as it described the action, linking the satisfaction derived from both.

By the end of his first day of writing, Keith had made significant progress. When she paid him an evening visit, Tess didn't press Keith for details, but five minutes of reading convinced her that Jessica would feel as involved as everyone hoped she would.

"You must be wishing you had a simple life again, like it was before the crazy lady showed up," Tess joked.

"Only for as long as it takes me to picture the crazy lady in her 'Very Naughty Tessa' T-shirt," Keith replied honestly.

Keith knew his efforts were driven by good intentions rather than creative expertise, but Tessa never let him downplay his intended contribution in his daily progress reports. When he told Tessa he was in the home stretch, she was excited to hear the news, though she sensed something was troubling him.

"Spit it out," Tessa said with a giggle after deciding she needed to address the issue.

"I doubt any of you will have time, but it would have been nice if one of Jessica's friends could have turned my little tale into an audio file she could sit and listen to, pausing it if she wanted to linger over something. It would be good to read, if it's up to scratch, but hearing the voice of someone who's been part of the project from the start would give it a more personal touch. I'm sorry I didn't think of it sooner," Keith told Tessa, feeling disappointed.

Once Keith had finished speaking, Tessa looked at him, taking a moment to choose her words carefully.

"If you let me know the moment you're finished, leave the rest to me. You might know about my T-shirts, nipples, and arty friends, but I'm the IT nerd around here, too. You've pointed out something I'd shamefully overlooked. I'd give you an appropriate thank-you gift for speaking up, but we've probably reached the cutoff for such things, since it's so close to the big day," Tessa said with a contented smile.

Tessa turned Keith's simple idea into a technological reality with minimal fuss. The recording required occasional corrections to tone down overly enthusiastic descriptions, but these tweaks didn't cause major delays.

Tessa and Keith sat together to listen to the finished recording. It was an experience Tessa found quite emotional, though she confirmed that everything sounded worthy of a place in the final piece of 'Five Decades Of Sex'.

"I'll tell the others what's happening in a message. Jess told me she wanted everyone to know about her special arrangements and that she's excited to feel part of everything. I've also added you to the chat so you can see how happy your efforts have made everyone," Tessa explained.

Once Tessa had made sure Keith could see the group's messages on his phone, she shared a few jokes and some idle chat with him. As the evening sun shone at the end of another hot day, she wanted to relieve her erotic tension, but doing so while wanting Keith to save himself for his creative engagement seemed unfair, so she kept the details of her horny mood to herself.

***

Keith woke early on the morning of 'Five Decades Of Sex' painting day. His desire not to let anyone down was uppermost in his mind, and Jessica's plight had put his doubts into perspective. He wasn't part of the art crowd, but Jess was, and he hoped that, as the philistine who had gatecrashed the party, he could at least make her feel as included as everyone else.

Just as Keith had done, Tessa had started her day earlier than usual. In truth, there wasn't much more she could do about what lay ahead, though the receipt of planned deliveries meant she saw Keith sooner than expected.

"I hope you're looking forward to your visit to our world this evening. I'm sure your circle of fascinating friends will have grown by the time the day ends," Tessa said, happy that Keith seemed relaxed, or at least as calm as she could reasonably expect.

"I'm sure being in your expert hands will help me through everything," Keith replied, though Tessa reminded him that his presence would be crucial to her enjoyment, too, and that his creative mind would be Jessica's new best friend.

The approaching event didn't feature prominently in the conversations Keith and Tessa had throughout the morning. Instead, they focused on memories from their lives, with a theme of humour at their own expense. It was the kind of escapism Tessa needed, and the conversations revealed more about Keith's personality.

"It sounds as if tonight will fit well with your love of curiosity-driven adventures," Tessa said, having listened to Keith's account of episodes when he'd wanted to see where a series of choices might lead.

The arrival of the promised delivery provided a natural break in the conversation, though one of the items offered an opportunity for more laughter.

"If I'd forgotten to order a supply of Isla's Scottish diet pop, I'd have had a feisty redhead to deal with, so I'm relieved to see that. I've got to keep her sweet. Her next mission is to open a gallery, and 'Five Decades Of Sex' will find its permanent home there when she does," Tessa explained.

Tessa's revelation was known to no one outside the group, but explaining Isla's intentions to Keith felt perfectly natural. Tessa knew Isla wouldn't consider it a liberty to talk to Keith about it, since Isla, like others, saw him as part of the circle even before they met in person.

"Knowledgeable minds mulling over the cultural significance of a cupful of my jizz? I'd pay good money to see that," Keith said, happy to voice his comical, philistine thoughts without fear of offending anyone.

"You'll never have to pay; I'll just whip off my t-shirt and thank you for the memories in the only appropriate way whenever you drop by," Tessa answered with a giggle.

Mentioning the T-shirt reminded Tessa that dressing for the evening was next on the agenda. It was another opportunity to introduce more of the humour she considered crucial to ensuring Keith got the most out of his inclusion in the group's world.

"Some events require weeks of planning to decide what to wear, but not ours. I couldn't possibly sit next to you without being 'Very Naughty Tessa,' but I took the liberty of having something made for you, too. It was a rush job, so it's simple, though I think it will suit you," Tessa explained.

Once Tessa finished speaking, she brought a packet from the kitchen and asked Keith to open it. As soon as he did, he looked at the clothing item she had given him and burst out laughing.

'Kinky Keith. Our Guest Artist For Tonight,' the T-shirt read.

It took a few moments for the laughter to subside. It would have lasted longer, too, if not for the alerts on Tessa and Keith's phones after Jess posted a message to the group.

'I'm on my way. I want to be painted, even though I won't be doing any rolling about. I'll be watching the action and listening to Keith's take on it. I think wearing the same kit as everyone else will be the perfect final touch. I might take a few moments to get naked, since I've got to be gentle with my back, but I'll be careful, I promise.' Jessica's message read.

"If we're helping you out, I think Keith and I should both wear paint, too. We should also stand next to the canvas in case someone wants to start working on their art. Putting paint on might be just too much fun and make your paintbrush impatient, so I'll have to keep a close eye on it," Tessa typed in reply.

Keith told Tessa he thought her idea sounded wonderful. He added that he'd wait until Tessa had painted Jess before helping her and getting himself painted.

"Perfect!" Tessa said as she heard the taxi Jess was travelling in pull up outside.

Tess helped Jess make her way into the studio. Once she was safely indoors, Keith greeted Jess with a smile as she was escorted to her seat.

"Lovely to meet you, Keith. Those T-shirts have me giggling already," Jess said with a smile.

Keith took charge of serving drinks and answering the door, while Tess helped Jess undress before painting Jess's body. Keith's tasks kept him busy, and Jess felt he handled them perfectly.

"He's very different from the guests who've played their part in our escapism before, but he seems to have exactly the right manner for our 'sixties' element," Jess whispered. Tess smiled and nodded in agreement, then applied more art materials to her friend's body.

New arrivals came thick and fast, and each was delighted to meet Keith. Writing the story for Jess and living in the same building as Tessa meant Keith had already gained a new fan club, and its members were thrilled to put a face to the name.

Once Tessa, Keith, and Jess were decorated, they took their seats while the rest of the group finished painting one another. The moment to get creative had come.

"I've added plenty of pauses to the audio so you can take time to enjoy Keith's story. You can easily insert more breaks, of course, but since you always know which buttons to press to get what you want, you'll be fine," Tess said to Jessica with a big smile.

***

As soon as Jess started listening to the story, the rest of her friends began their own fun. A mass of bodies began to move together in erotic harmony, painting the canvas as they did. Tessa, meanwhile, ran her hands over Keith's body, and Keith did the same to Tessa.

Crossing their hands as they sat together, Tess and Keith's sounds of pleasure and laughter soon joined those from the floor. Jess soon felt aroused as well once the story had placed her on the sheet with her friends.

"I'm already down there with everyone," Jess giggled, turning to look at the author of the story she was listening to.

Tess and Keith were overjoyed by what they had heard and felt they needed to begin Keith's painting as a celebration. They did so as Jess began to listen to an account of exactly this, which made her gasp with erotic anticipation.

Jess paused the audio. As she did, Tess ran one hand over Jess's body and took hold of Keith's cock with the other. There was plenty of noise from the floor, but the sound of the seated trio making erotic noises of pleasure together was the clearest.

While others painted their art in front of them, Tess fingered Jess and pulled purposefully on Keith's egg. The sounds from those seated matched those from the floor in their erotic intensity, and Keith could already feel his pulse racing and his manhood twitching with the urge to erupt.

"Let him paint, Tessa," Jess laughed.

Listening to her old friend read her new friend's story aloud while being expertly aroused made Jess long to see a new canvas come to life.

Tessa reacted to what she had heard by pulling hard and fast on Keith's cock and thrusting her touch into Jess. The sight and sound of Keith firing a shot onto the canvas, as Tess described it, sent Jess wild, and she came with a squeal as Keith groaned in orgasmic delight.

Tessa's dexterity ensured she could please both of those beside her as they roared their approval and exploded in climax.

As those on the floor worked on their art, Keith and his willing assistants ensured that his canvas was splattered with more critics' talking points. It was a scene the trio knew they'd never forget, as they focused on the action elsewhere and savoured the waves of pleasure surging around their bodies.

Tessa, Keith, and Jess had all experienced very intense orgasms, so they took a few moments to relax and watch the show in front of them. Once they had done this, Jessica's needs prompted her to return to listening to Tessa's reading of Keith's story.

"The next part's more for fantasy than for bringing it to life, but hopefully thinking about it will get me painting and give you something to giggle at," Keith explained to Jess. After making the audio recording, Tessa knew exactly where the story would go next, and realised there was something she could do to make Jess's listening experience even better.

"If I wore Keith's canvas like an apron at the hairdresser's, I could add a bit of 'spit rather than swallow' action to the design. It's the final segment of 'Five Decades Of Sex,' so I think it deserves a few elements I hadn't expected until a couple of minutes ago!" Tess explained, voicing the idea that had occurred to her as Keith mentioned the next audio scenes would be fantasy-based.

"That sounds fantastic, and I can't imagine Keith having any problem with your plan!" Jessica shouted, drawing laughter from those seated beside her.

Once Keith agreed to the plan, Tessa stood from her chair and draped the black sheet over his upper body. Tessa's body ached to begin, and Jess was also showing signs of arousal and impatience.

"It's time to suck and spit out a masterpiece," Jess laughed.

Tessa moved Jess's chair to a better viewing spot, then knelt before Keith. Keith's canvas was tucked under Tessa's chin. With everything in place, everyone was eager to begin.

Jess resumed listening to her audio story as she watched the narrator kneel before the author. All around her, others were squirming and painting with their bodies, but her focus was on those beside her and on the touch she had eased into her pulsating wetness.

"Being stuck on the sidelines isn't as bad as people sometimes make it sound," Jess giggled.

As Tessa began to draw on Keith's cock, she had a plan to satisfy both artistic and erotic pleasures equally. Jess, meanwhile, was listening to Tessa narrate the part of Keith's story that was about her own body being sucked to orgasm.

Tessa felt Keith twitching and trembling between her hard-working lips as Jess listened to Tessa describe Keith using his lips on her body in the story.

Keith's telltale groan prompted Tessa to pull his egg out of her mouth. She scored a bullseye skilfully, too, as Keith spilled his cum onto the sheet draped over her.

Jess screamed with joy as she watched the scene, while listening to an almost identical account in Keith's story.

With Keith having added to his canvas, Tessa resumed her lipwork on his egg. She was happy to donate the first shot to art, but kept everything she could drain afterwards for her own amusement. Jess, meanwhile, paused the story and relished the most beautiful descent from erotic highs she could recall.

Once Jess had savoured the aftermath of her pleasure, Tessa smiled at her.

"When you know someone as well as I know you, it's clear when they've given it their all and need time to recover. I'm looking at the beautiful Jessica when I say this, but I'm talking to you, too, Keith. Those on the floor can stretch things out as long as they wish, but you're both done. No one in this room thinks you've let anyone down; quite the opposite. They'd be after me with a naughty stick if I stayed quiet. I can always help you add more to your canvas after today, Keith; you're only a few feet away once I'm home from work," Jess said with a grin.

Both Jess and Keith knew that what Tessa had said was correct. They also realised that having someone like Tessa looking after them made them very fortunate.

"I hope you'll let me sign your artwork before we all go home," Jess asked Keith.

Tessa knew exactly what Jess meant, and Keith did too, once Jess had coated her erotic juices onto his black, cum-covered bedsheet art piece as an extra touch.

Living in the same building meant Tessa could help Keith add extra detail to the piece of art he'd helped create. It was no hardship.

Keith's contribution to 'Five Decades Of Sex' was a project piece he and Tessa enjoyed developing whenever an evening slot became available. This was excellent news for everyone, especially Isla, who was thrilled to learn that one of the centrepieces in her soon-to-be-launched art space was 'coming along nicely'.

Once Isla had opened her new art space, Keith's sheet took its place among the other elements of 'Five Decades Of Sex'.

Keith will always be sceptical about art, but he's happy to play an active role in any new project Tessa and her group undertake.

To Keith, Tessa will always be 'very naughty.' She'll always be 'horny when wet,' too. To Tessa, Keith will forever be the crowning glory of 'Five Decades Of Sex,' and he remains her neighbour-with-benefits to this day.