I am not a stepmom as of yet. However my boyfriend's daughter is on my last nerve. She cries constantly when she doesn't get her way. Everytime I get her broken of the habit she's back with her mom and I starts all over again. At first everything was fine now she is out of control. I take care of her when he's not a round she acts up but an expected amount for a three year old. As soon as her dad is around I can't stand her. She is mouthy and stubborn not just to me but also with him. I get I'm infringing on daddy time but seriously. Like I said at first it was fine but everyday it gets worse and I count the days til she is returned to her mother. Idk if I can take it.