Ivy Is Danny's Godmother - Tumblr Posts

Joker stabbed Harley in the stomach when she told him she is pregnant. In pain and bleeding out, she turns up at Ivy's safehouse. Ivy gives her a glowing green vial she received from Ra's al Ghul in exchange for the carnivorous plants she gave him for disposing of bodies. Harley drinks the water and the wound closes, but she stays with Ivy over the course of her pregnancy to make sure Joker won't try to cut out the fetus again. When she finally gives birth it's in the safehouse with her, Ivy, and Dr. Thompkins who promised she wouldn't say a thing to anyone. Baby Danny is born with his eyes open and glowing green, but they soon fade to Harley's blue. Harley and Ivy had already discussed what to do with the baby and decided Gotham was too dangerous for him, so Ivy makes the journey to Amity Park to drop him off with her old friend, Maddie Fenton, who agreed to take him because her and Jack were having trouble conceiving.

When Harley eventually returns to the Joker, she tells him she drowned the baby in Gotham Bay.