Andi Rose befriends Madi Collins, the most popular girl in school. She wants to meet on July 4th, but her stepbrother Zac Wild is in charge while her parents are away. Zac initially says no, but when he sees who Madi is texting to, he changes his mind, provided Andi repays his kindness by fucking him. Andi agrees and Madi comes over to help decorate. When Madi arrives, the girls begin putting up patriotic decorations and discussing how they could serve the military. Zac tries to fit into the conversation and says he’s thinking of signing up.
The girls mock Zac for failing in the military. Embarrassed, Zac begins to take off his clothes to prove he’s a muscular specimen. The girls fight back by flashing their tits and taking off their panties. Somehow, Zac ends up in the scuffle by accidentally sinking his cock into Andi’s pussy. Andi is surprised, but she likes the way Zac feels inside her. She encourages him to keep going while Madi strips herself and masturbates at the sight of the step siblings fucking. This is the beginning of a full-fledged threesome. The girls party by getting on their bellies and working together to give Zacs Hardon a double blowjob.
Madi gets a chance to sample the goods when she climbs on Zac and impales herself for a reverse cowgirl stiff ride while Andi goes out of her way to double her friend’s pleasure. Then Andi gets on her knees to take Zac’s cock in doggy style while muffling her own moans by eating Madi. The girls switch places with Madi on her back so she can let Andi ride her mouth while Zac fucks her. When Zac sits down again, Andi climbs on board to ride him. With Madi’s fingers on Andi’s clitoris, Andi soon moans and cums off her climax. After a second splash, Andi moans with delight when Zac gives her a big creampie so she can lick Madi clean.