Animations would actually be the easiest part of it by a ton. It's remaking all of the events that would be hard.
I would have to do this: Let's say there's an event with Lin, Kali, Ashley and Maria. I would have to make an image for if only Lin is pregnant, Only Kali, only Ashley, only Maria. Then I would have to make images for if Lin and Kali were pregnant, if Lin and Ashley were pregnant, if Lin and Maria were pregnant, etc. Then I would have to do it for if three characters were pregnant, then for four, and so on, and so on. It would be 32x ( I think ) the amount of work and images I have to make at 8 characters.
Animations are easy, I just make it like I would with another outfit.