Madi Collins, the most popular girl in school, and Andi Rose are becoming friends. Though their parents are gone, her stepbrother Zac Wild has been placed in charge of organising their Fourth of July get-together, which she really wants to have. When Zac sees who Madi is texting, he originally says no, but then changes his mind—as long as Andi repays his chivalry by fucking him, of course. When Andi says yes, Madi stops by to assist with decorating. The girls begin decorating with patriotic themes and talking about how they would help guys in the military when Madi arrives. In an attempt to join the debate, Zac says he has been considering joining. Zac is made fun of by the girls for not being able to succeed in the military. Feeling ashamed, Zac begins removing his clothes to demonstrate his impressive muscular physique. The girls retaliate by removing their pants and showing their titties. Zac inadvertently ends up sticking his dick into Andi's pussy during the altercation. Though shocked, Andi is fond with how Zac feels within her. While Madi takes off her own clothing and screams at the sight of her stepsiblings having sex, she urges him to carry on. That initiates a full-fledged trio. In celebration, the girls climb onto their bellies and collaborate to give Zac's hardon a double blowjob. While Andi tries everything to intensify her friend's enjoyment, Madi gets a chance to experience the goodies when she climbs on top of Zac and impales herself for a reverse cowgirl stiffie ride. Then, while she stifles her own groans by eating Madi out, Andi drops down on her knees to suck Zac's dick in doggy. The ladies trade places, with Madi lying on her back to allow Andi to ride her lips as Zac sexily touches her. Andi gets on Zac's back and rides him when he sits down again. Andi is soon squirting her climax and groaning with Madi's fingers on her clit. Andi sighs with pleasure as Zac gives her a large cream pie for Madi to suck clean following a second squirt.