Aria Valencia comes into the living room where her stepbrother, Jay Romero, is watching TV. When Jay comments on how many shopping bags Aria has, Aria admits that she has an impulse control issue. Jay tells Aria that he has an impulse control problem too. He wants to run up to random girls on the street and lift their shirts, then run his hands over their nipples until they're hard. Aria asks Jay to show her. She meant over her shirt, but when Jay lifts her shirt and gives her a true hands-on demonstration Aria doesn't stop him. Jay's embarrassment is overwhelming when Aria opens up that she wasn't expecting him to rub her boobs, so he runs out of the room.
Later, Aria and Jay are cleaning the dining room when Aria tries to make it up to her stepbrother by telling him that she has sexual impulses, too. She wants to go to guys and pull their pants down and play with the D while talking to the guy's mom like nothing is wrong. Aria then offers to let Jay play with her tits again. He does as Aria asks, then inquires whether that means she's going to try to play with his dick in front of his mom. They agree to role play instead of doing it for real since they all live together and Aria doesn't want to make things awkward. Talking out her fantasy as her hands play it through, Aria unzips Jay's pants and fondles him before saying she'd probably want to suck on his cock. Dropping to her knees, she makes good on that part by sliding Jay's hardon into her mouth for a sloppy deep throat BJ.
The two stepsiblings don't try to fight it as their mutual impulses to fuck overwhelms them. Moving to the couch, Aria lays back and lifts one leg up so Jay can sink balls deep into that tight twat. Aria adjusts her position so she's on her hands and knees so that Jay can take her from behind. Then, Jay takes a seat so Aria can climb onto the cock and bounce away in reverse cowgirl stiffie ride. Getting off her stepbrother's dick and onto her knees between his legs, Aria resumes her blow job. As Jay gets closer to popping, Aria keeps on talking dirty about how much she fantasizes about him cumming all over himself right in front of his mom. That last bit gets Jay off, prompting him to blow his load for both of their satisfaction.