I've always been shy and timid and a bit nerdy, my step brother has always protected me from bullies at school and I've always adored him for being my protector. I've always wanted him to see me as more than just his nerdy innocent step sister but he's never seemed interested in me in that way. I heard from our parents that he's a werewolf just like my step father, and my parents know he's reaching maturity and they will be leaving for the weekend to search for a mate for him. This horrifies me because I know that once a werewolf mates with someone, they are mated for life unless they lose their mate. I don't want my beloved step brother belonging to anyone but me, and I know this is my last chance to make him mine. If I could just get him to fuck me, he will be mine forever. It's risky, but I can't lose him! I invite him to my room and tell him I need some help with a sex ed project, before I know it we've come to a "you show me yours and I'll show you mine situation" We're both staring at each other completely naked and his perfect black cock is as hard as a rock, I tell him that he can put his cock in me and without hesitation he's inside me and I'm riding his BBC ! Bouncing up and down moaning telling him how badly I have always wanted him and now we are mated for life! He fills my hairy pussy with loads of cum and I know the deed is done! We are mated for life!