Sometimes I imbibe too much. Last night was one of those nights, and I barely remember how I got home. All I wanted to do was crash hard and slept the day away. I still live with my parents and step-sister, but fortunately for me my parents were gone for the week on vacation, so I didn't have to worry about getting caught. My sister, on the other hand, would probably tell my parents if she knew. Particularly because I ratted her out for having a party at our house one night and not letting me invite any of my friends. Screw her, it's my house too. So here I was crashed on my bed, when the next thing I knew the sheet was ripped off of my head, and standing at my feet was my freakin' sister! I was really disoriented, and couldn't seem to move my hands. Everything was a little blurry at first before I realized that the bitch had tied my hands to the bed! She was pissed! It seems that my mom ragged on her for having a party and she knew that I snitched. She owed it to me I guess, but I wasn't crazy about being hung over AND tied to the bed! I looked over my shoulder to see what predicament I was in and saw that she had cut up my favorite red shirt and used it to tie me to the bed frame. That fucking bitch. Just wait until I get my hands out of here (and sober up). I felt really humiliated, laying there in my boxers, feeling very exposed to my hot step sister. It was sort of turning me on, and the next thing I knew she noticed my boner and sat on the bed with me. She laughed at my situation, and then began to pull my boxers down to take a look at my rod. Holy crap! She took my cock in her hand and started stroking it to make it harder, as she continued to make fun of me for being turned on by being tied up by my sister. Then, she took out her cell phone and started taking blackmail pictures of me! Now I was really starting to feel afraid ... yet really aroused at the same time. I think my sister was getting off on having this power over me. She took out her huge tits to further embarrass me and turn me on, delighting in how much harder my cock was becoming. She called me a sick fuck for being turned on by my sister, and threatened to post the pictures she took on facebook! Fully in control of me (and my cock), my sister began to fuck me with her enourmous tits. Her tits are absolutely perfect, and felt incredible. The shirt that she tied me up with began to feel tighter as I strained against the bondage. She then straddled me and pulled her panties the side to show me her cunt. She was getting wet! I wasn't the only pervert in the family. Then she turned around so I could see her ass. I couldn't touch, because my hands were restrained, but I really wanted to. She bumped her pussy up against the head of my dripping cock. The only thing separating me from fucking my sister was a thin piece of fabric. When she turned around again, she took my cock in her hand and really started to go to town, teasing me. She asked if I like my sister's big hand around my cock. She put her mouth right next to my cock and told me I was sick for wanting my sister to suck me off. I felt en enormous load building up. She kept a steady rhythm going until at last one of the biggest loads I ever shot spewed out of my swollen cock. This was the hardest nut I ever had, and at the hand of my sister! I was spinning for a while after that, and came back to consciousness to find that my sister was gone, and left me tied up in a puddle of my own messy cum. Starring: Alexis Grace