Hi all, so my partner and I have been together for four years now and he has an 11 year old daughter from a previous relationship. I get on really well with his daughter, I have grown fond of her and I know she likes me too. However, I am finding that lately she is misbehaving quite a lot and my partner seems to be overlooking it. She does 'naughty' things which she thinks are funny like smearing food on people (usually me because she can get away with it more) and throwing things around. It's beginning to get quite exhausting and although I tell her nicely to stop when she does these things, she usually laughs and finds it amusing. I have spoken to my partner about this but he became quite defensive and acted as though this was an attack, which I really didn't intend for it to be. I feel like he isn't firm enough with her and lets her push boundaries, whilst also treating her much younger than she actually is. It's beginning to exhaust me when she comes over and I really don't want it to be that way, as like I said, I do care very much about her. Am I being unreasonable?