My name is Mike and this is what happened to me when I was 25. I’d visited a massage parlour and enjoyed the casual sex. The girls were sexy and willing to try anything, which was a real turn on. I wasn’t leaving Sally so I persuaded myself that this was OK, and the sex was amazing.

A few months after this started Sally’s sister, Alison, called me and asked if I’d go over to hers as she wanted to talk about a present for Sally’s birthday. I thought it was a bit odd that we could’t sort this over the phone but Alison said I needed to be there.

I drove over and went in, expecting this to last a few minutes at best. My first surprise was finding her younger sister Jen there as well, and they looked determined. 

“Sit down, Mike,” instructed Jen.

Jen always made me feel as if I’d done something wrong, She had that air of the perfect woman (probably why she was still single). Alison said "Sit down, Mike!”

I began to feel a little uneasy as they both looked so serious. I began to speak but Alison cut me off.

“We asked you to come because we believe that you are having an affair. We decided it was only fair to talk to you face to face and let you tell us if this is true and why you are doing this to hurt our sister."

I immediately told them it wasn’t true and that whatever they’d heard I was not cheating on my wife.

Little miss perfect, Jen, stood in front of me. “We thought you might try to wriggle out of it but we have proof. So this time tell us the truth before we tell Sally what you’ve been doing.”

“No! Please don’t tell Sally. Yes, alright it’s sort of true...”

Jen shouted me down, “Sort of true! Tell us the truth.”

Again I repeated, “Please don’t tell Sally. I’m not having an affair. I just went to a massage parlour a few times.”

Jen bent down, looking into my eyes, and I saw immediately that she was not wearing a bra. My cock responded, despite the dilemma I was in.

“You went to a massage parlour a few times! You mean you had sex with a prostitute, don’t you!”

“I, er…er... not the first time.”

“Not the first time? How many times did you visit and how many times did you have sex with a prostitute. No more lies; you don’t know how much we know.”

I was cornered. Jen was right. I didn’t know how they knew and how much so I told them the truth. “I’ve had sex with four different girls on about twelve or thirteen occasions.”

There was silence in the room.

Alison broke the ice. “This is worse than we knew about. Jen and I need to decide how much to tell Sally." 

Again, I pleaded for them not to tell Sally. “I’ll do anything,” I said. 

They left the room, leaving me sitting there on my own for what seemed ages. 

They returned and sat either side of me. Alison took the lead, “We are sure that telling Sally will hurt her a lot but you cannot just behave this way and get off scot free. Jen, tell him what happened to your friend’s husband.”

Little miss perfect put on her ‘I don’t want to have to tell you this’ voice but in fact she was loving it.

“A friend of mine found out her best friend’s husband was playing around so three of us went to teach him a lesson. After he’d admitted his affair we punished him. All of us punished him and made him suffer so that he’d never do it again.”

Alison took over. “We’ve decided to give you that option, instead of telling Sally. It will be an unpleasant punishment, an embarrassing punishment and you will remember it! Your decision.”

I had no choice so I agreed.

“Right, strip down to your underpants.”

"Not here, please, your window looks straight out onto the road,” I pleaded.

“We told you it would be embarrassing. Stop putting it off or we’ll punish you more,” said little miss perfect, Jen.

I was stripped down to my brief underwear when a young lady walked past. She glanced in through the window, then stared straight at my crotch. I was getting a hard on. She smiled and walked on.

Alison took over. “First each of us will give you a hard hand spanking over our knee."

She sat down in an upright chair, directly in front of the window.

It was no use arguing. Jen instructed me to stand still before coming round in front of me. Kneeling down, she hooked her fingers in the waistband and slid my pants down. Such was my erection it hit her on the chin as it sprang out, making her yell.

Both girls' eyes were locked on to my throbbing erection.

Jen added, “You won’t be so cocky in a while, Mike.”

Alison beckoned me over and I bent over her knees. As I lowered myself into position she gripped my cock hard between her thighs and smiled.

Then she rained down hard hand spanks which were OK at first but began to sting until I yelled out for her to stop.

She did, briefly, before telling me that I’d better be able to take this because Jen was next and then they’d start on the strap. She continued for another five minutes until I guess her hand began to hurt. As I stood, she grabbed me by the cock, stopping me from rising, before giving it a slap. 

Jen took her place and repeated the routine. She was wearing a very short dress and no tights. She gripped my rigid cock but it felt electric between her naked thighs.

If she was not wearing a bra or tights, I wondered if she was wearing knickers. I moved my hand up her skirt and was rewarded with a slap on the face, But I'd found out she was naked under her skirt.

By the time she finished I was almost crying, and looking at the reflection in Alison’s glass door, I could see how red my bum was.

Jen brought over a small side table and I was instructed to bend over, keeping my legs straight and wide apart. My cock and balls were fully on view from behind.

“Each of us will give you 10 strokes of the strap. If you try to stop us or get up or protect yourself, you will get an extra stroke.”

When I remained silent, she flicked the strap across my upper thigh. “Do you understand?”

“Yes, yes,” I muttered.

The table was low so my bum stuck out; an easy target.

Thwack, thwack, thwack. My strap punishment began. Thwack.

“Ow, ow, shit,” I shouted as the strap flicked between my legs and caught my balls.

“Oh dear, you stood up, so you’ll get an extra stroke.”

I bent over and took the remaining strokes without moving, though my bum was sore.

Alison told me to rub my bum and from the look on their faces they enjoyed seeing my cock swing from side to side. She took hold of the strap, which I saw now was about one inch wide and about nine or ten inches long.

I bent over the table. Alison flicked the strap on the inside of my thigh to make me stand with my feet further apart. 

Thwack, thwack. It continued until I had the full ten strokes, including another ‘accidental’ flick between my thighs, this time catching the tip of my cock. 

Alison told me to stand. She gripped my erection and slid the foreskin back fully until it hurt. “I think it is only right that you know what punishment remains and you can choose which to take next. We will each give you ten strokes of the cane on your little red bum. We will each give you ten strokes of the strap on your naughty cock; we will each spank your cock with stinging nettles to finally teach you to only put it where it belongs.”

My mind raced. Nettles on my cock! I had to choose which bit of punishment came next. A movement through the large window caught my eye and I looked up to find three young women staring at my swollen cock. I covered myself and they moved off, giggling. 

“No more on my bum, please, it’s very sore.”

Jen smiled as she gripped my cock. “The strap or the nettles on your penis. Which do you want?”

I realised that neither was not an option. “The strap,” I said. “Final answer!”

Alison brought the strap down hard on my cock. “Remember why you are being punished. This is no laughing matter. Right, lie down on your back along the sofa.”

I got into position, my rigid cock standing up straight.

Alison repeated Jen’s move, sliding my foreskin hard down the length of my cock. Thwack, thwack, thwack. My cock swung about as each stroke struck home, some on the shaft, some on the head, some underside of the shaft. Weirdly, although it was painful it was incredibly arousing.

Jen took over and chose to stroke my cock to make sure it was fully rigid. Thwack, thwack, thwack. Little miss perfect was enjoying inflicting pain on me and I was still enjoying the strange sensation. She couldn’t help herself from giving me a bonus stroke after the ten and smiled as she put down the strap.

“I think you were enjoying that. Let's see how you like the nettles!” Now she was really enjoying herself. Little miss sadist perhaps. 

They’d already picked some nettles which they brought in to the room in a vase. I was facing the window and I’d been warned not to cover myself if I saw anyone. Two young ladies in their late teens had spotted me, and eyes wide, had stared through the window before shrieking and moving on. 

Alison put on a glove before picking out a sturdy looking, fresh nettle which she shook to remove the water. It looked nasty. 

I waited with bated breath, unsure how or what she was going to do with the nettle and how painful it might be. She pushed down the foreskin, and stroked my cock until it was fully hard. Then she stroked the nettles along the shaft, from my balls up to the head. The tingling began and then grew into sharp stings as she pushed the nettle down into my balls, around the shaft and then round and round the helmet until I cried out. 

She continued, alternating between stroking, pushing the nettle into my cock and finally using the nettle as a stick, giving me ten strokes before throwing the nettle down.

Jen now picked up a fresh nettle in her gloved hand and gave me a most unsettling smile. My cock had responded to the nettles and despite the stinging remained incredibly hard. At this point a gorgeous looking woman came right up to the window and looked through in amazement before knocking on Alison’s door. Alison brought her into the room and I received a swift flick of the strap when I tried to cover myself. 

She was wearing a tight, thin, pink T shirt which didn’t hide much of her firm, braless tits. Her taut bum was encased in pale blue hot pants and her legs went on for ever. My cock responded and precum oozed down the shaft.

She stood facing me. “Hi, I’m Jackie,” she said, turning to Alison. "What are we doing here, can I join in?”

Alison explained why I was being punished and agreed to Jackie taking part.

Without waiting for more she grabbed a glove and picked another fresh nettle from the vase. “You’ve been a very naughty boy, I hear, so I’m happy to help you see the error of your ways.” She pushed my foreskin back before twizzling the nettle around my cock helmet until I cried out. She’d watched Alison stroke my balls with a nettle and pushed hers into my balls and under my balls, hitting a fresh target. She flicked and stroked the nettle up and down the shaft before once more going for the head until I cried out again.

She threw the nettle away and without warning took me in her mouth, swirling her tongue around the helmet and pushing down so I was deep inside. I could hold on no longer and shot my load. She didn’t pull away and continued to use her tongue to amazing effect. 

Finally, my cock began to soften as Jackie moved away, grinning. 

From the look on her face, Alison was angry with her friend as she led her to the front door and gave her a very curt goodbye. 

When Alison returned, she flicked the strap across my limp cock. “Don’t think this is the end of it, Mike. We’re going to invite you back for the rest of the nettle punishment and some strokes of the cane on your bum. We’re only just beginning. Get dressed and we won’t say a word to Sally.”