The Amazing World of Gumball - Season 4 Episode 5 -

Dad discovers that Granny Jojo and Louie are planning to get married and move to Florida. To stop this happening he adopts Louie so that he can forbid him from marrying Granny Jojo. But this triggers a series of adoptions within the family which quickly spirals out of control, and causes the unexpected return of someone from Dad's past