We are supposed to go swimming at the beach and your step-mother is dressed in the most revealing far too small bikini. Your step-mom is a slut and loves to show off her thick body to arouse men and boys, and it's just so embarrassing, but a turn on too. You get jealous because of your taboo relationship with your step-mother. You love when she tells you to jerk off and sometimes to do other things too. You don't want her tits popping out at the beach, the minuscule thong barely covers her pussy and certainly doesn't cover her huge ass. Since you seem not to like her tiny bikini she strips down and tries on her black bikini, which is supposed to cover her ass but barely does. She notices your erection though and you can't go to the beach like that. She talks about how she will tease everyone there with her tits and ass hanging out of everything she tries on for you, and lets you blow your load on one of her bathing suits.