Juan Loco and his adopted sister, Jessie Saint, have had a thing going on. Unfortunately for Juan, Jessie decides mid stiffie ride that they shouldn't be doing this. Climbing off her brother's dick, she tells him she doesn't care if he has blue balls, she's done. Juan says he's gonna go tell his stepmom, Vera King, and if she won't take his side then he'll fuck her too. Jessie knows that her only chance is to get to her mom first.
Jessie gets her chance on Mother's Day, when she brings Vera a card and breakfast in bed. Just as Jessie spills water on Vera's chest and offers to wipe it up, Juan comes in with a gift of his own: A back massager. Jessie can't believe that Juan has tried so hard to one up her, which leads to the siblings arguing over who gets to use the vibrator on Vera's back first. In the scuffle, neither of them notices that the vibrator has wound up buzzing away on Vera's twat. She's not about to stop the fun until the fighting starts harshing her buzz. At that point, she tells the kids to kiss and make up. Literally.
It turns out that Vera knows what her kids have been up to and now she wants to watch and play. She starts by having Juan eat Jessie out and then fuck her. Vera contents herself with the vibrator as she watches the kids go at it, but eventually she craves a piece of Juan's hardon. She gets it doggy style while eating Jessie out. Then she rolls onto her back so Jessie can ride her mouth while Juan keeps pumping for her pleasure. Jessie gets a turn in the middle, mimicking Vera's initial position. Once the girls are satisfied, they finish Juan off with a double blowjob until he gives them a facial to round out their family fuck fest.