Of course, the majorette doesn't know how to please her pussy anymore - she's had this and she's had that. Now she's getting to the driver. Only she doesn't feel anything for him, so she uses him as a free phallus. But he fucked her asshole hard to get even for the part she intended for him. Let her mouth serve as an asshole to go down in!
Well, by the looks of it, the booty sister has been wanting to fuck her brother for a long time, so that's how it turned out.