IENF-455 I wanted to lose my virginity with my first girlfriend, but I never thought it would be with my sister...

A younger sister is shocked when her beloved brother has a girlfriend for the first time.My younger sister is jealous of her, and on my brother's cell phone, he says things like, ``You're making me double-crossed,'' and ``I can't believe you're getting a girlfriend when you have a younger sister like me!'' and it's really crazy!But while I was drunk and sleeping, my younger sister inserted herself into me without permission, straddled me on top of me, and was shaking her hips!But it felt so good!