Addams Family Values (1993)

Pugsley and Wednesday Addams aren't happy with the new addition to the family: their new baby brother Pubert. Morticia is restless and Gomez only wants her to be happy, so he tries to fix everyone's problems by hiring a nanny and finally finds the perfect nanny in Debbie: a seemingly-innocent woman with an impeccable wardrobe and a way with her hands. She charms the family, especially Uncle Fester, who falls head-over-heels. But Wednesday and Pugsley see through her sensual façade: she's only after Fester's money. Before they can rat on her, she ships them off to summer camp, then marries Fester. While she tries (and tries and tries) to kill him and make it look accidental, Pugsley and Wednesday must battle ever-cheery camp directors and spoiled rich kids to get back to their family and warn them about Debbie.