Wife’s sister watched us ….

When she stayed with us in our apartment before we moved to our currently home , three of us living in a one-bedroom place, but we made it work. And she was fun to be around, my wife’s younger sister, she was relaxed and funny, plus she cooked for us. And, of course, she was gorgeous. I’ll call her Lena.

Lena’s seven years younger than my wife (she was older than 18 when this happened, don’t worry). They look broadly similar, tall, slender, blonde, beautiful. When she stayed with us, I had to keep reminding myself that Lena was essentially my younger sister, especially when I found my eye straying to her, when I found myself checking her out.

Lena sure didn’t make it easy though. She often wore tight t-shirts and tiny shorts around the flat, especially when it was hot. I had to fight not to stare at her long, smooth legs and her full chest and rounded, perky ass.

Lena didn’t actually flirt with me, thank god, but I often felt her eye on me too. And then, there was the night she watched us.

My wife and I slept in our bedroom, her sister on the sofa bed in the living room. We must have forgotten to close the door that evening. We probably made more noise than we should have. 

I was between my wife’s spread thighs, making her moan and press into my face as I licked her pussy. But as I focussed on her clit beneath my tongue, I saw movement in my peripheral vision. I flicked my eyes in the direction of it. Our door was more than halfway ajar and Lena was standing in that open space.

My first reaction was to tense up. I stopped lapping at my wife’s cunt, but she moaned in complaint, she reared into me with greedy insistence, until I settled into licking her again.

My wife laid a hand to her cunt, she brought herself off again, with me, as I made a wicked mess of her. My wife eagerly sucked on my prick as she climaxed, swallowing the last of it. When I looked up, Lena was orgasming with us, that free hand was clamped over her mouth, her eyes were looking straight into mine.

I’ve never told my wife that her sister watched us. And Lena acted perfectly normal with me afterwards, for the rest of that summer visit, even if we both knew what had happened.

We’ve still never spoken about it. But more than ten years later, with Lena a successful professional, with her an accomplished woman, I can’t stop thinking about her playing with her pussy as she spied on us that night.

I wonder if it’s on her mind, too, each time she sees me at family gatherings?