IENF-455 — I wanted to lose my virginity to my first girlfriend, but I never imagined I'd lose it to my sister...

The younger sister is shocked that her beloved older brother has gotten a girlfriend for the first time. She's jealous of her and secretly tells her brother on his phone that he's cheating on her and says things like, "How dare he get a girlfriend when he has a sister like me!" She's totally crazy! But then, while he's drunk and asleep, his sister secretly inserts herself into him, straddles him, and starts thrusting her hips! And yet, it feels so good!