On a deserted beach at twilight in horny sis, waves kiss her ankles as she peels off her sundress. Salt air hardens her nipples instantly. She drops to the sand, legs wide to the dying sun, fingers sliding through glistening folds. “Feel horny sis with me,” she invites the ocean, moaning “horny sis” with every rolling wave. She fucks herself slowly at first, then frantically, sand sticking to wet thighs while “horny sis, horny sis, deeper horny sis” spills from her lips. The tide creeps closer; cold water laps at her ass just as she comes, squirting into the surf and screaming “horny sis” loud enough for distant gulls to hear. She lies there afterward, tracing lazy “horny sis” patterns in the wet sand between her legs.