Step-Son, I've caught you jerking off to my pictures multiple times now. Out of all the sexy older women in the world, why do you choose to masturbate to your own biological step-mother? I think it's precisely the taboo nature of our shared DNA that turns you on so much. I think you have a fetish for "the I-word!" If you're going to jerk off to your own step-Mommy, you can at least let me watch! I tease you with my cleavage before taking my top off to show you the breasts that fed you. You love looking at step-Mommy's juicy ass, so I let you get a long, close look while you tug on your cock. I can tell how much you love when step-Mommy talks dirty about the taboo nature of this act, so I remind you frequently of the fact that you're my biological step-son and I gave birth to you. Finally, I get completely naked and spread my pussy to show you the very hole that brought you into the world and let you wank yourself to my taboo cunt until you cum.