If My Step-Sister Can Get Tag-Teamed By Randoms She Can Fuck Me Too

My step-sister and I went to college at about the same time. I joined a fraternity, and she decided that she'd rather have an apartment. It works out really well for her, because she can just go to all the parties my frat throws whenever she wants. I even gave her a key to my room just in case she needed to stay over. Well, last night, she ended up using my room for something else. There were two French foreign exchange students at my party, and well, she let them BOTH fuck her raw. Not only that but I had to grab something from my room, and when I came in, saw what was going on. She didn't even notice me there, but I was there long enough to take a very incriminating picture of what was happening! The next day, she is feeling rough, and I go over to her apartment to “check on her.” It doesn't take long before I am holding the photo over her head and saying I will show everyone (including our step-parents) if she doesn't fuck me! Not only that, but once she actually agreed, I saw that she had this GIANT bush. I hate hairy pussies, so on top of fucking me I made her shave it off before I'd even let her. She didn't even think I was serious, but once she was done shaving; there I am with a hard cock waiting. When she realizes I am not going to change my mind; she knows she can't risk me showing anyone. So she sucks my cock, rides me in reverse, and then lets me bend her over until I cum all over her ass.