Tony has torn his jeans and is trying to fix them himself as his stepsister Mackenzie Moss plays on her phone nearby. He asks Mackenzie for help, but she insists she'll only give him a hand if he lets her borrow his car for the night. She tells him to put the pants on so she can mend them and swears not to poke him. On her knees, she goes to work sewing as Tony creeps on her tits. Mackenzie is close enough to realize that Tony is getting a boner from looking at her boobs. Pissed, she pops it out and calls him disgusting.

Mackenzie shoves Tony down, then stumbles and falls on his dick. Not wearing panties beneath her miniskirt has consequences as he slides into her wet pussy. Mackenzie likes the way Tony's dick feels, so she agrees to change up the deal that she gets to borrow his car if she'll fuck him. They relocate to the bedroom, where Mackenzie gets naked and climbs into bed on her hands and knees so Tony can smack her ass and tell her about how he fantasizes about her sucking him.

When Tony climbs into bed with her, Mackenzie makes his day by putting his dick in her mouth. Then she hops on top to give him a cowgirl ride. Reverse cowgirl is next on Mackenzie's agenda as she enjoys the feel of Tony's hands shaping her bottom. Rolling onto her back, she spreads her legs all the way so Tony can give it to her. Then Mackenzie gets on her hands and knees so her stepbro can keep the good times rolling doggy style. Tony can't wait another moment to blow his load, so he pulls out of Mackenzie's hot little twat and nuts all over her plump sexy ass.