The third time Johnny walks in on Gia, she decides that maybe he should stay. She's been watching a lot of stepbrother porn, and she's getting some ideas about how much fun the stepsiblings could have. When Gia offers to suck Johnny's dick, he puts up some token resistance before letting her have her way. It turns out that Gia knows how to deliver one hell of a blow job, which just makes Johnny open to her suggestion that they take things all the way.
Getting into bed together, Gia lays on her side and lifts her thigh so Johnny can fuck her from behind as they spoon. She rolls onto her back to change up the angle of penetration, but that's still not enough to satisfy her. Getting Johnny onto his back, Gia climbs aboard for a bouncing titty stiffie ride in cowgirl. Johnny gives it right back to Gia as he bangs her on her back, then has her get on her knees to take a doggy style pussy pounding. When Johnny can't hold back another moment, he pulls out to nut on his stepsister's big booty as she reflects that stepsibling porn is just as hot as the real deal.