DD is a very mature 14 (15 in April). She is supposed to go to her dad's this weekend and he's told her not to come as she doesn't get on with her new step mum. It's a difficult one as DD can be a pita but I don't think she's at fault in this one. However, I have plans that may involve staying out overnight. She's adamant she could stay here alone and not tell anyone (I believe her) but obviously I'd have rather that she had been older. I just don't see how I can force her to go to her dad's but selfishly I don't want to have to cancel my plans yet again because of my ex. WWYD?