Your sister and her boyfriend came home unexpectedly and caught you perusing her panty drawer. He beat the shit out of you, and watching got her so turned on she gave it up to him right then and there. "Serves you right, you perv!"
I had been working on my Domme side and made it my goal to not let my partner cum in me for a week. Last night was the night I gave up control and he fucked me like an animal