Our parents have been having trouble keeping my stepsister in check and put me in charge of keeping an eye on her. She probably thought she could outsmart me, the same way she outsmarts our parents, sneaky little bitch, which is why she was so perplexed when I caught the sexy brunette coming back home at 5 a.m. in the morning. I had a blow horn in my hand, I just had to press it to wake our parents up and she would be in deep shit and she knew it. We made a compromise, she would blow me, and I would not blow the horn on her. My dick was already hard as a rock just from hearing her idea, as she dropped to her knees and began sucking and stroking it. I had no idea that my stepsister could be such a dirty slut. I was so into it that I blew my load inside her mouth and she had to swallow it all! She got pissed because cumming in her mouth wasn’t part of the deal and stormed off, but I knew that deep down inside she enjoyed it as much as I did. A couple days later our parents left, leaving me in charge, so I took that blow horn, went to my stepsister’s room and woke her up, sending her to do the chores and checking out her tight ass as she scrubbed the kitchen floor on all fours. My dick got hard, so I pulled dhow her shorts and panties, ramming my hard cock deep inside her dripping wet pussy and fucking this bitch doggie style from behind! I let my hot sister ride my pole at a perfect orgasmic pace. I made her ride my cock in cowgirl and reverse cowgirl position in reverse before blowing my load all over her.