It was ten years ago now. We were on vacation at my now wife’s mother. It was a long trip, basically as far apart as you can be within Europe. My girl and I were 23 and 22 at the time.

My god, we were like rabbits back those days. Couldn’t keep off each other. We would do it two or three times per day, at minimum. Our best personal record was six times in one day, just the year before.

So that one afternoon, in the middle of summer, I whispered in my girls ear: “Let’s sneak upstairs.” Just whispering this, cheek to cheek, in the middle of the kitchen around her family members had visibly turned her on.

I snuck upstairs first and my now wife joined a few minutes later. We thought we were being very incognito. Years later I learned that the floor creaked loudly from the banging all the way through to the living room ceiling.

We were going at, my now wife on top. She’s a thick curvy girl. I loved watching her full boobs bounce in my face. But we not so tuned into each other as we are now. We were just happy to do it, so to say. So we were going at it hard and fast. My girl was moaning a little, but trying to keep it under control.

At the very last moment, we heard someone coming up the stairs. We looked deep into each other’s eyes, with a sense of disappointment but at the same time not be able to stop. I stop pumping my hips and she slows down her grind.

Our gaze meets again but this time with a bigger sense of urgency. Due to renovations, there was no door on the room at that point but there was one between the corridor and the stairs. It swung open. Foot steps came down the corridor towards us. Fast. We quickly hid under the sheets.

My girls sister came into the room, carrying her lap top. “Let’s watch a movie.”, she said with a tired tone. Clearly overstimulated by being back at home with her parents, even if it was just for the summer vacation.

My sister in law, 20 years old, a student like us, plops the laptop on the bed at our feet. She then proceeds to crawl into bed, right next to me, deeply sighing and reaching out to get the laptop back.

It was a narrow bed, my wife and I were stuck together. We exchanged a few glances but we kept as silent as we could. The sister didn’t seem to have noticed anything at this point. My cock is still at full mast. The sheets were thin for summer, I try my best to hide the tent. At the same time, the situation turned me on. My wife grabbed my butt a few times from behind which didn’t help.

Sister in law then proceeds to huddle up against me and puts on some kind of movie. I have long forgotten which but I remember being hard for at least the first half of it. By pure luck, she never accidentally touched it.