In their birthday outfits, Mia and Lola tease their stepdad, Sgt. Miles, with innocent charm. But as the party winds down, their fantasies heat up. They start slowly, rubbing each other's bodies, their breaths quickening. Miles watches, his cock straining against his pants. Soon, Mia's hands are on Lola's pussy, her fingers sliding in and out, while Miles fucks her mouth. They switch places, Lola's tight cunt taking his cock as Mia watches, jealous and aroused. They end their birthday with a messy, satisfying threesome, their bodies glistening with sweat and cum.