Have you ever been shocked about another side of a person?

my cousin who is pregnant has changed over a new leaf. she was spoiled and bratty and thought the world ruled around her. when she found out she was pregnant its like a diffrent person has emerged. my boyfriend couldnt stand her now he wants to be around her. i can see she is changing for the better. its so werid but i dont know how things are going to be after the baby. i hope she doesnt teach her daughter to be the way she used to be. i hated her when she was little