Blackmail step-Sister Into Anal

Great, I have the house to myself and I'm ready to have some fun while step-mom, step-dad, and step-brother are away. I grab their booze and start watching porn since I'm alone. Except you should up out of nowhere and bust me. You say you're going to tell step-mom and step-dad unless I play some truth or dare with you. You give me some easy task that I protest to like taking off my clothes and fondling myself. Then you dare me to put on step-mom's lingerie and show you how I touch myself. I get so turned on by doing this that I do whatever you tell me too. You then ask me to spank myself till my ass is beat red. You want to take what? My anal virginity?! Because I'm being blackmailed and secretly horny as fuck I let you. You cum in my ass despite me telling you not too. Then I push out the cum and show you my ass. Next time just ask if you want to fuck my ass silly step-brother.