Yea she was before she aged (normally with out the hack), but when she didn't age, I had my sim change her.

I recently had a family have a baby today, and the infant won't grow up. The parent will get the action to help with birthday, but they just stand there holding the infant, and nothing happens. I have even tried to grow them up using the InSIM, but that hasn't worked out so well.. Any idea's on what I can do?