Alex Mack is totally into his stepsister Molly Little, but both of them are trying to pretend that nothing is amiss. While Molly is in the middle of riding Alex's face, mom lets Molly's best friend Lexi Lore in. Lexi nearly catches them in the act and she makes it clear that they should definitely fuck already.Later, Lexi sets up a situation where she begins playing fuck marry kill with the stepsibs. She encourages Molly to make out with Alex while she watches. Then Lexi instructs Molly to suck Alex's cock, which she's eager to do. The sight is so hot that Lexi can't help masturbating while urging the stepsiblings to fuck. Once Molly is on her knees for Alex to do her in doggy, Lexi licks her anus for double the pleasure, then settles in so Molly can eat her out. Sucking Molly's juices from Alex's cock, Lexi climbs aboard to ride him in reverse cowgirl as Molly watches and diddles herself. Lexi takes her own doggy-style pussy pounding while munching Molly's cooch.