The Sims 4 100 Baby Challenge w Harley Quinn and Joker! Harley Quinn is pregnant with the Joker! Leave your baby names for Harley Quinn and Jokers baby! Harley Quinn the matriarch of this Sims 4 100 Baby Challenge , as we play out the story between Harley Quinn and the Joker. The Joker is locked up in jail, and Harley is the key for him to escape! Will Harley fall in love with the Joker and have 100 babies with him?! We will have to find out as the story of Harley Quinn and the Joker unfolds in The Sims 4 100 Baby Challenge.