Convince my step brother to have rough sex with me and cum inside me

I've been nursing a secret desire for my stepbro since I can remember. Not just any stepbro, but the one with a monster cock that I've been craving to be filled with. His cock is so big and thick, it makes me salivate just thinking about it. I've been working on him for a while, trying to convince him to give in to my tempting offers. I'm a hot 18-year-old with big natural tits, and I know how to use them to get what I want. I've been teasing him with my curves, my tight ass, and my big tits. I've been begging him to fuck me, to fill me up with his big cock, and to cum inside me. I know he wants me too, he just needs a little persuasion. I'm going to make him mine, one way or another.