I think it is possible that she kept him if she got out of jail immediately because she gave birth which is possible and then she kept him for a few weeks and then gave him up. Regina said she didn’t adopt him until he was three weeks old. I think there isn’t much of a chance that happened, but i do think it would be pretty cool. Sometimes all you have is the backseat of a car. And Emma was arrested in Mass i think it was and Henry was given up in Phoenix. We just don’t know right now. I think it would be interesting if that ended up being true though.