It's Liv's birthday, and her three stepsons make a bet over who can get her the best present. Tony, the oldest, buys her a nice outfit. Nick, the youngest, bakes her a cake. Nade, the middle and smartest, discovers Liv's obsession with anal porn and buys her a butt plug. Initially skeptical, Nick and Tony soon realize Nade's gift is perfect. Liv, who has always fantasized about anal sex but has a prudish husband, is thrilled. Touched by her wish, Nade, Nick, and Tony decide to make her fantasy come true, filling all of Liv's holes and giving her the best birthday ever.