Basically when Jason was back at the league him and Tahlia fucked and Tahlia purposefully got pregnant, but didn't tell Jason, 9 months later when he's living with Roy and Kori Tahlia shows up and is like here have your child she won't have a good life at the league her name is Daya Rae Al Ghul Todd (fem!Damian) and Roy and kori are like wtf but also aww. For like 4/5 years shits goin ok then the batclan show up.