Before dinner.

Martha felt her heart race as she slowly made her way through the familiar hallways of her daughter Liza's home, each footstep echoing through the empty house. She had always loved the way that Liza's house felt, warm and welcoming with a touch of elegance. Martha had always known that she was welcome here, but today felt different.

Today, she was on a mission; she HAD to seduce her son-in-law, after her own daughter had begged her to.

Martha made her way to the kitchen; she began to prepare for the arrival of her son-in-law. She knew it was crucial that she made him feel as comfortable as possible.

She began the dinner, then got herself dressed.

Making sure she looked like a million dollars, she wore a tight-fitting red dress that highlighted all her best assets and made her look like a vixen. She applied her makeup meticulously, making sure her eyes were smoky and sexy, with her red lips matching the dress. She then went to the living room, where she waited for Mike to arrive, her heart pounding in her chest as she anticipated what was to come.

Martha didn't have to wait long, as she heard the sound of Mike's car pulling up outside.

She took a deep breath, trying to steady her nerves, as she bent over the oven, her ass pointing towards the kitchen door.

Martha couldn't help but feel a thrill of excitement run through her body as she heard the sound of the door opening, knowing that Mike was now just a few feet away from her.

"Now that's a sight for a man to come home to," Mike said as he grabbed her ass, Martha keeping herself in position and not moving away.

"Glad you think so," Martha replied as she stood up and turned around, her eyes sparkling with mischief.

"Jesus, Martha, I'm so sorry, I thought you were Liza.” Mike stammered, his eyes widening with surprise as he quickly let go of her.

"Oh, that's ok, Mike, I'm here to fill in for Liza,” Martha said as she moved closer to him, her hips swaying seductively. "Any way I can." Martha purred as she looked up at him through her long eyelashes, her hand reaching out to rest on his chest.

"Oh, that's right, Liza has the work thing tonight," he said, still sounding slightly flustered.

"Yes, she does," Martha nodded, her hand slowly creeping up.

"Dinner won't be long, why don't you go get washed? I will sort drinks,” Martha told him, her fingers tracing the outline of his abs.

Mike hesitated for a moment, torn between wanting to escape the situation and feeling drawn to Martha's seductive charms.

"Sure, okay," he finally said, his voice low and slightly hoarse.

Martha couldn't help but feel a surge of triumph as she watched him walk towards the bathroom, her eyes glued to his firm ass.

She let out a sigh of relief, feeling a mixture of excitement and nervousness wash over her. She had made the first move, and now it was time to follow through. Martha quickly poured herself a glass of wine and took a large sip.

She cast a thought to her daughter and hoped her night at the work thing with Gary was going well. Martha let out a soft sigh as she imagined what her daughter was doing with Gary right now.

Martha had always suspected that Liza had a thing for Gary, and she couldn't blame her. He was handsome and charming, and Liza had always had a wandering eye for Gary.

Martha knew that if she wanted to give her daughter the best chance at marrying Gary, she had to help her pursue him, no matter the cost, and seducing her husband Mike would be the right thing to do. And that cost, at least for tonight, would be her own body.

Martha knew she was still an attractive woman, and knowing how similar she looked to her daughter, albeit an older version, she was confident in her abilities to seduce Mike. 

Martha checked her phone again, waiting on Mike to get into the shower. She opened the message Liza sent earlier from the hotel after the couples massage; the image lit up the screen. Liza's robe was open, her naked breasts exposed, and lying next to a sleeping Gary, Liza had her tongue sticking out cheekily and had typed:

Either let him sleep or wake him with a BJ?

Martha had typed back to her daughter right away:

Defo a BJ wake up.

She chuckled to herself, imagining the scenario in her head. Martha had always wanted to see Gary and Liza together. She had no qualms about helping her daughter achieve this goal, and she had already planned everything out, all in the name of lust and love.

Martha took a deep breath and finished off her wine, putting the empty glass in the sink. She dropped a text to her daughter.

I hope you are fucking stallion’s brains out. I'm about to find out how lousy your husband is in the sack. Plan in motion.

Martha then walked towards her daughter’s bedroom, undressing as she went. She slipped off her dress. She walked the rest in the lacy underwear that Liza had helped her pick out; she told her mother Mike would love them. The high heels making her feel powerful and desired.

Martha pushed open the door to Liza's room and went inside; the shower was still running.

She walked over to the bed and lay down on it; she propped herself up with her daughter’s fluffy pillow and waited.

She stretched her body out on the bed, feeling the coolness of the silk sheets against her bare skin as her fingers traced along her skin. She could hear the sound of the shower running in the background as Mike took his time getting ready.

Martha felt her arousal growing as she imagined what was about to happen. She thought about how much Liza must be enjoying Gary's cock right now, his fingers and mouth all over her body, making her scream with pleasure, putting load after load of baby-making juice in her only daughter.

She reached down between her legs and began to touch herself inside the sheer lace panties, her fingers moving in slow, lazy circles around her clit.

She could feel the wetness seeping through the fabric, making her slick and slippery.

She moaned softly as she continued to touch herself, lost. She thought about Liza mingling with Liza's co-workers.

Martha heard the shower go off and the door open. She focused her eyes on the en-suite door, taking another deep breath, as she felt a mixture of excitement and nervousness wash over her.

She heard his footsteps growing closer; she spread her legs wide; she pushed her fingers inside herself, giving Mike a clear view.

The door opened, and Mike, with only a towel around him, stopped dead in the doorway.

His eyes widened as he took in the sight of his mother-in-law sprawled out on his bed.

"Martha, what the fuck??" he exclaimed.

Mike did look good if you were into abs and athletic looks; Martha preferred heavy and short me, like Gary.

But she knew she could make do with what was in front of her. It was for her daughter, after all. Martha removed her hand from her panties, and with her fingers glistening in the light, she motioned for Mike to come closer.

"Come here, darling. I'm all ready for you," Martha said, with a seductive tone in her voice.

Mike hesitated and never looked away.

"Martha, you need to leave. This is wrong," he said, but he didn't move from the doorway.

His eyes were wide with shock, but there was a hint of something else there, too.

Martha knew what it was.

He wanted her, even just a tiny bit.

And she was going to give it to him.

She sat up on the bed, her breasts on full display; she spread her legs.

"You don't sound very convincing, Mike," she said, her voice laced with desire.

"No, please leave now, Martha," Mike pleaded, his eyes locked on her breasts.

"But, darling, you did make the first move in the kitchen!" Martha purred, reaching up to run her hands over her breasts; she squeezed her ample chest for him.

"I thought you were Liza, Christ. I'm sorry, Martha." Mike stammered, his eyes flicking from Martha's breasts back to her face, his towel showing just enough to reveal a hint of his growing arousal pressing through.

"Well, you say that, but I think you knew. I think you want a little fun with your mother-in-law while your wife is working so hard at the work event thingy," Martha replied with a knowing smile.

She could see the hesitation, the struggle warring on his face.

"I'm married, Martha. I love Liza,” Mike said, sounding torn.

"Don't worry about Liza. She is too busy with work. I bet it’s been weeks since you last fucked her properly," Martha said, her voice dripping with innuendo as she reached out a hand towards Mike.

"Martha, please. We can't do this to your daughter. I love my wife," Mike responded, his voice wavering as he tried to resist the temptation of Martha's seductive charms.

But Martha was relentless and reached behind to undo her bra, freeing her full breasts from their confinement.

"Just let go, darling," she whispered, cupping one of her breasts in her hand and offering it up to him. "No one has to know, just think of this as a little deserved fun." She gave a wink and leaned back on the bed, spreading her legs wider.

Mike hesitated for a moment longer, but the sight of Martha's bare breasts, her hard nipples, and the slickness between her legs was too much for him to resist.

"No, I need you to leave. I won’t say anything about this to..." Mike weakly protested, his towel already starting to tent with a growing bulge.

Martha saw her opportunity and seized it. With a seductive smile, 

"Sure, I can get off this bed, I could put my clothes back on, and I could leave your house very, very horny. Or," she murmured, reaching out to pull her panties to the side and pulling her pussy open. "You could come over here, stick that cock inside me and fuck me right on this bed until either you cum or we both cum."

Mike hesitated just for a moment longer before giving in to his baser desires.

"Liza doesn’t have to know. No one has to."

Mike stepped closer, allowing Martha to wrap her hand around his shaft and guide him towards her.

"This is wrong,” Mike said as he climbed up the bed to between her legs.

"I don't give a fuck about right and wrong, and let me tell you, you won’t either once you are fully inside me,” Martha moaned as she felt him pressing into her.

Mike couldn't resist the temptation any longer, and he sank his cock deep inside her wet pussy. They both cried out in pleasure as their bodies collided.

Mike groaned as he began to thrust in and out of her like the man who had been weeks without release.

Martha wrapped her legs around him and arched her back, meeting his every movement with an eagerness of her own. She was very happy Gary had convinced her to get some sexual practice in over the last few days; it had been so long since she had had dick, and the three hook ups dusted off the cobwebs, practice makes perfect she thought.

She reached up and grabbed onto his shoulders as he thrust into her, her fingers digging into the muscle there. She could feel her own pleasure building up inside of her, her muscles tense with desire as she felt herself getting close to the edge.

"Oh, Mike," Martha screamed, her voice echoing through the room as she appealed to his vanity; she pretended it was Gary between her legs and found herself more excited with every thrust of Mike's hips, her fingernails digging further into his shoulders.

"Harder, harder,” Martha demanded, and Mike obliged, driving his cock deep into her again and again. The sound of their heavy breathing and the slapping of their skin filled the room, obscene moans escaping Martha's lips as she got closer and closer to orgasm.

Martha had to admit, Mike was far better than the three men Gary had convinced her to pick up for practice. Those men had been in the volunteer group she had joined and were older than her.

Martha reached down and began to suck and lick Mike's nipple; she manufactured another moan from her son-in-law as he pumped in and out of her.

"Give it to me, Mike," she whispered, her voice husky and full of desire before sucking hard on his nipple. "Give it to me. She panted, breaking contact with her lips.

"Fuck," Mike groaned as he fucked her harder and faster, his big balls slapping at her arsehole.

Martha felt her own orgasm building up inside of her, her muscles tightening as she imagined Gary thrusting inside her.

"Yes, come inside of me," Martha whispered in his ear, her voice laced with desire as she wrapped her arms around him and pulled herself against him, her tongue slipping over and inside his ear.

The sound of the bed springs vibrated through the room. Martha wrapped her legs tighter around him, pulling him deeper into her as he pinned her down with his muscular body to the bed.

"Oh god," Mike cried out, his release filling her up.

Martha produced a very realistic fake orgasm; she shook her body under him, shuddering and moaning, and she clenched her muscles around his cock as she milked every last drop of his release.

Martha clung to Mike as they lay there, their bodies sweaty and spent.

She knew she had done what she needed to do, and she couldn't help but feel a sense of pride at her own seductive abilities; Gary would be pleased with her, and Liza would be free to marry Gary. Martha looked up at Mike, who was still panting and trying to catch his breath.

"That was incredible," Martha murmured, running her fingers through his hair as she looked into his eyes.

"Yeah," Mike agreed, still sounding shocked by what had just happened. "It was."

Martha could see the guilt written all over his face, but she couldn't bring herself to care; with her fingers entwined in his blonde hair, she pulled him into a deep kiss.

Martha could feel Mike's cock softening inside her as they kissed each other with fervour; she could feel him pull his hips back and his cock retracting.

Martha reached down and grabbed onto Mike's ass, pulling him forward, keeping him inside of her as she wrapped her legs around his hips to hold him in place.

She didn't want to let him go just yet, not when her senses were allowing her the fantasy that Gary was on top of her, his fabulous cock inside her.

"Stay with me, just like this, a little longer," Martha whispered with her eyes firmly closed.

She didn't want to open her eyes; she wanted the thrill of the illusion just a little longer. 

"We shouldn't, I shouldn't," Mike said, his face etched with guilt as he looked down at Martha.

"Stay," Martha pleaded, her voice sounding more needy and desperate than she would have liked.

She bit her lip and closed her eyes, trying to keep the fantasy alive for just a little bit longer. Mike hesitated but eventually nodded.

"I'm so sorry. I have let Liza down,” he whispered, full of guilt, as he withdrew from her and lay down beside her.

"Like hell you did, you were amazing," Martha replied, leaning in to kiss him again. She appealed to his vanity once more, building up his manhood.

"I want more," Martha murmured against his lips, grinding her hips against him.

Mike groaned, "We can't, you should leave!"

"No, I'm not going anywhere. I want more of that cock. Whether it’s before or after dinner is up to you,” Martha purred, her voice full of desire.

She reached down and began to stroke his limp cock, feeling their mixed love juice over it as it twitched in her grip.

"You're my mother-in-law," Mike protested.

"Fuck being just a mother-in-law, and my daughter’s husband has the most amazing cock. No way was this a one-time thing, buddy," Martha murmured, as she mustered every bit of vocabulary that would boost his ego.

"Martha, listen to what you are saying. We are talking about your daughter, her betraying her…" Mike protested.

Martha cut him off by sticking her tongue in his mouth; once she had quelled his protests, she spoke softly.

"I know what I am saying, I know what I want, and I know you want it too," Martha said as she climbed on top of him, kissing him.

"I think we should sit down to that lovely food I have cooking away, and if you are a very good boy, I will let you take me again after dinner," Martha whispered in his ear, her voice dripping with desire.

Martha rolled off him and to her feet; she held out her hand, and Mike took it.

She helped him up and walked from the bed. She turned to him as he bent down for his towel.

"No need for clothing. I can have dinner just as we are," Martha told him as they went naked into her daughter’s kitchen.

Part 2 is written, so I would love to hear if anyone is invested.