The Grim Adventures of Billy & Mandy

Spider's Little Daddy (3x1)

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At a father-and-son picnic, Billy re-encounters with his spider "son", Jeff, in a dirty bathroom. Once again, Jeff tries to make Billy love him, but Billy remains terrified of bugs. Then, Mandy tells Jeff he is being too nice, and in order to get Billy's attention he needs to be meaner. After being coached by Mandy, Jeff finally snaps and ensnares Billy in his spider web, forcing Billy to say he loves him.