I'll Do Anything My Stepdad Wants if He Keeps My Secret

My stepdad found out I was failing half of my classes. There was no way I could let him tell my mom, so I begged him to keep the secret and offered to do anything he wanted in return. When he asked me to get on my knees and take my shirt off, I knew what I had to do. I could see his cock getting hard even before he took his pants off. I've never tasted a dick before, and his cock looked fat and big, so maybe this wouldn't be so bad. I started licking it and slowly shoved it inside my lips. The deeper it was, the harder I wanted to suck it. Why was my dick getting hard? Maybe I also craved this? When he licked my ass, I confirmed I did. This was supposed to be a favor for him, but I was desperate to feel his cock inside my ass. Right before I had to beg him to pound me, he fucked me. He filled my ass so hard I was afraid the neighbors were going to hear my moans. My stepdad knew how to use his dick, and every part of my body wanted more. Maybe I could fail more classes on purpose?