My step father doesn't know it, well maybe he does, I've given him enough hints. That I want him to fuck me. He's so muscley, so manly and so fucking gorgeous, I masturbate often imagining him fucking my pussy but especially my asshole. My mom isn't what he needs as I often hear her say no to his sexual wants. And I know because i'm a sexual slut, I could make him happy by giving him everything he wants and desires. I've even been leaving my worn panties lately in his car, after I've masturbated in them, wiping my pussy clean with the gusset. He knows they're mine as he always puts them back in my laundry basket. I've checked them out and he's definitely whacked one off using them to smell my scent. I don't want to hurt my mom, but I know I could keep her husband far happier than she does. It's just a matter of figuring out how not to hurt her and how to get my step fathers cock all to myself.