it's not everyday a pregnant villain joins the league of villains, you didn't know you were pregnant when you first joined,but after a few months,the signs started to show,but the reason why you were allowed to stay,was because you were a really strong asset to the team and they couldn't just let you go

They started letting you go on less dangerous missions because you were close to your due date, which no one was looking forward to,not because they hated the children,but first... because they are villains and once the baby is born, they will all be involved,but the main reason is because, villains don't really have health care or the equipment to give you a "safe birth" and lastly...where where they gonna get nappies and whatnot? You were also scared

You were on a mission with Dabi, y'all were fighting against endeavour and some other heros,when your water broke...that caught the attention of Dabi and he ran straight for you,to help get you out of this situation,but this caught the attention of the pros,they had to get you now,so that they could help you but also arrest you afterwards

Dabi: are you okay? He was kinda worried, under that emotionless face,one that was always full of sassy and hate He picked you up and tried to get you away from the pros,who were now after y'all