Johnny and Amiee, step-siblings on vacation, find themselves alone in their cozy beachside cabin. Amiee, a luscious brunette with a penchant for showing off her thick curves in tiny bikinis, catches Johnny's eye. As they lounge on the couch, she playfully straddles him, grinding her ass against his growing bulge. He slips a hand between her legs, feeling her wetness through her bikini bottoms. Amiee moans, her big tits heaving as she rides him in cowgirl, her juices soaking his swim trunks. They switch to doggystyle, Johnny gripping her ample hips as he dry humps her, his cock throbbing against her pussy. Amiee's cries fill the room, her body tensing as she reaches climax, Johnny's hot breath on her neck.