My reserved stepsister propositions me for intense intimacy in exchange for arranging my living space

I've always been a bit of a prude when it comes to my stepsister. I mean, she's hot - like, smoking hot. Huge tits, huge ass... I wouldn't mind getting up close and personal with her, but I don't want to cross any lines or make things weird. So, when she came to me asking for some help setting up her new digs in the dorm, I was more than happy to oblige. But then, as we were chatting, she dropped a bombshell on me - she wanted to proposition me for some serious action in exchange for helping her out. I couldn't believe it! I mean, my stepsister? The girl I've known my whole life? But hey, if she's into it, why not? So, we got down to business, and let me tell you, it was one of the wildest rides of my life. She's a total amateur, but damn, she's got skills! We went at it again and again, and she even managed to squirt all over me. It was a crazy, hot mess, but I wouldn't have it any other way.