Tl;dr – fucked my girlfriend’s sister on her 18th birthday
Girlfriend – Riley
Sister – Claire
In all honesty I always felt some sexual tension between her sister and I, but obviously that’s wrong – who fucks their girlfriend’s sister?
When we’d shop with her family, she’d always ask me to go to another store with her, zip up her dress, see her in the outfit. She always made a point to have my attention. She’s one of those hyper-fem bi types and she knows it turns me on. The fishnets, the skirts, the tight shirts and high tops.
But I always knew it would never happen.
One night we were celebrating Claire’s 18th birthday. We played games, drank a bit, watched a movie as a group. As her friends started to leave, Riley and I were getting frisky under a blanket, teasing each other. Before long we couldn’t take it and she grabbed my arm and announced to the room we were getting some sleep.
As soon as her door latches we’re making out and both get naked. Petite and pretty thin all around, Riley was the less endowed of the two physically. After some time exploring each other’s bodies, we decided to try blindfolds again. She tied me up and covered my eyes.