GODR-515 - Drunken little sister, I couldn't hold back anymore...

My little sister is fast asleep, drunk and vulnerable. Seeing her exposed thighs gave me an instant, rock-hard erection. I couldn't hold back anymore! Under one roof, we're not just siblings, we're just a man and a woman. Once we started, there was no going back, and it turns out she was waiting for it all along!