After the Joker was turned "normal" at the end of "The Final Joke" he met and fell in love with Bethany, eventually being invited to her house to meet her kids, Sofia and Benicio. At some point he started living with them. In "A Fight Worth Fighting For" after he was turned to his old self, he returned to the house to get Queen of Fables' fairy tale book and end things with Bethany. However, he realized what they had was real and returned with Harley Quinn and Batman to get the real book which was still at the house and win Bethany back. By the end, Joker got her back and decided to stay with the family at the house.