Help Me Study and I'll Be Your Freeuse Slut

College is expensive. I couldn't afford it, and my parents convinced me not to get a loan, so I got a scholarship instead. Now, I need to do tons of schoolwork and maintain perfect grades. It's impossible! Or at least it used to be until I convinced my nerdy stepbrother to help me. In return, I had to become his freeuse slut. As long as he was helping me, he could use my body in any way he wanted. I thought he would only touch my boobs, but he was a bigger perv than I anticipated. He licked my tits and my ass, slipped his dick inside my pussy, and made me suck his cock dry. The issue is that I was starting to like it. My grades were excellent and his dick was gigantic and always hard for me. I wouldn't be able to pass my classes or have those kinds of orgasms without him, so let the fucking continue.