Gabrielle and Carlos are granted temporary custody of baby Lily because the birth father isn't available - he's on spring break since he's still in high school.
Gabrielle is tired of getting up several times a night, so she palms her off on her maid, Xiao-Mei, swearing her to secrecy because she doesn't want Carlos to know. She's so grateful, she gives Xiao-Mei a gift certificate to her favorite spa. Gabrielle rushes off to meet Bree for lunch and is horrified when Bree says she just came from a spa treatment where she ran into Xiao-Mei! Gabrielle speeds home and vows never to leave Lily alone again.
Paul Young has a nasty fall on his front steps and finds they've been greased with shortening. Felicia pops by to cheerfully ask if he's hurt. Next, his BBQ turns into a fireball when his lighter fluid's been replaced by gasoline. Then, he wakes to find his house is covered in an exterminator's tent. Felicia says it's all a mistake, it's for her house and she must have written down the wrong address. Paul tells her this harassment has to stop. In a low voice only he can hear she asks him if he's going to shoot himself like Mary-Alice did. He flips out and attacks her, and she calls on all the neighbors and workmen to witness how unstable Paul is.
Lynette is mortified when Parker's teacher tells her that he offered a girl a cookie to see underneath her dress. Suddenly, all he cares about is where babies come from. So she briefly explains the birds and the bees, omitting a few details. Next, he asks Mrs. McCluskey, who advises Lynette to shut him up by telling him sex is dirty and wrong and she finally has no choice but to do just that. But then she decides the better option is to give Parker a new obsession: a puppy.
Susan realizes she still has feelings for Karl, who's incredibly attentive, even while planning his wedding to Edie. Julie is furious about it, so she refuses to go to a movie with her mother. As luck would have it, Mike's there on a date. Rather than be caught alone, she sits down next to the nearest single male, Orson, a dentist who gamely introduces himself to Mike as Susan's date -- until Mike leaves and Orson's girlfriend joins him. Orson later shows up at Susan's doorstep with the purse she left behind and she ends up explaining her whole complicated love life to him. He advises her to forget about Karl, since it doesn't sound like he's changed at all.
Susan takes his advice and tells Karl to go ahead and marry Edie, but then he tells her he's called the wedding off. She takes pity on him and invites him in for a bottle of wine and they wind up in bed together. When she finds out that Karl hasn't actually broken up with Edie yet, she throws him out for good.
Bree and Andrew get a surprise visit from her father, Henry, and stepmother, Eleanor, who are determined to patch things up between them without airing the family's dirty laundry in public. They both rattle off their long list of grievances and Henry and Eleanor realize that a quick fix just won't cut it. Eleanor announces that they're taking Andrew to live with them and Bree is devastated.
She runs into Justin, who is hurt that Andrew is moving without even telling him. Bree asks Justin what he sees in Andrew and he tells her how his own parents threw him out when they found out he was gay and how Andrew stood by him. So when his grandparents are loading up Andrew's things, Bree just happens to leave a box open containing gay videos and magazines. Andrew's grandparents not only decide to leave him where he is, but to revoke his trust fund.
Andrew is crushed when he finds out, but Bree softens the blow. She's invited Justin over for dinner.