My wife Carol and I were down at our local nude beach, with her sister Liz, and Liz's husband Luke.
This had become a regular thing for the four of us. All through summer we would head down here on Saturday afternoon. Then afterwards head into town for dinner and a movie.
I don't even remember how we got started with this routine. I think if I remember correctly I suggested the beach to Carol and she was too shy to try it on our own, so she invited her sister.
I didn't mind the extra company, Liz is as hot as any sister in law could get.
Liz and Carol look very much alike, there is no doubting that they are sisters. At twenty three, Liz is the younger one, Carol is twenty six. Both are five foot six inches, slim, and both are endowed with D cup titties. They are both brunette with hazel eyes, although Carol always dyes her hair so it is sometimes hard to remember what her original shade was. Carol only waxes the edges of her pubic area for her bikini, but she keeps the rest neatly trimmed. I was stunned the first time we came down here. Liz keeps her pubic area totally bare. Unlike Carol, Liz also has very prominent, protruding, inner labia lips. The kind that are perfectly made for sucking on. I keep thinking to myself "Damn Luke, you are a lucky bastard."
Luke and I are also pretty similar to look at. I'm five foot ten, and Luke about five foot eleven. I weigh one hundred and eighty five, and I think Luke would probably go ten to twenty pounds heavier than me. In contrast to our wives, I keep my pubic area completely bare, while Luke leaves his natural. As far as cocks go, I've seen Luke with a hard on more than a few times, and he is about seven inches long, and almost two and a half inches wide. I'm almost eight inches long but not quite as thick as him.
We had been on the beach for about two hours when I felt the need to head to the toilets. We had a cooler full of beers with us and beer always seems to go straight through me.
I stood up and said, "I need to leak, back soon."
I headed up the beach to the toilet block which is located near the path that leads down from the car park to the beach. Once in the building, I headed straight to the urinal and let rip with a long steady stream. I had just finished and was squeezing out the last few drops when a hand and forearm was wrapped around my chest, and a second arm was pressed across the back of my neck, pressing my forehead against the cistern. The voice in my ear hissed, "You came in here to get yourself fucked, didn't you?"
"You want a man to shove his big cock into you and fill you with his cum, Don't you?"
Without waiting for a response he lined his cock up with my anus. I felt the head of it pushing against me. I clenched my anus shut tight to make it hard for him to penetrate me.
He had obviously lubed himself up before he came into the toilets because I couldn't stop him entering me. In one slow and steady push he drove his entire cock deep into my body. He didn't stop until his balls were pressed against mine, and his hips were pressed hard against my butt cheeks. "You like that, don't you?" he hissed, "Feels good to have a big, hard cock deep inside you, doesn't it?"
I couldn't say anything as the hand that had been pushing my head against the cistern had moved around to cover my mouth before he penetrated me. All I could do was moan into his hand.
He started to withdraw his cock until only the head was left inside me, then he again slid the entire length of his cock all the way into me. "Yes, you love it." he hissed, "I can tell from the way your sphincter keeps clenching around my cock each time I try to withdraw."
Again and again he would withdraw until only the head was inside me, then he would thrust himself forward until he was fully inside me again. With every stroke he was driving his cock over my prostate. I could do nothing to stop my cock from getting rock hard. I could do nothing to stop my cock from twitching and jerking every time his cock pressed against my P spot.
