Bit of background:
I have always got on really well with DSD - have known her since she was 4 and she is now 9.
She hasn't had that easy a life so far - my DH and her mum split up when she was 2, as her mum had met someone else - they moved in together and got married, but then split up when DSD was about 7, then moved in with the mum's current boyfriend.
About 70% of the time she is a lovely well mannered girl, but the rest of the time there is this horrid part of her that is a stroppy, attention seeking naughty child.
When I was pregnant she told her mum that she wished that she could kill me and the baby, and that when he was born she was never going to come to our house again, then when he arrived, she threw a toy across the room at him when he was 10 days old. Recently she has tried to rip up a photo of our ds, and then lied about it and said that her mum had made it up. Yesterday we confronted her about the lying - very calmly - we just told her it was wrong and that we understand it is difficult for her (jealousy issues), but that she must never lie. She went in a huge strop and started crying and said that she just wanted to go back to bed.
Every week I tidy her room, and every time she comes back she gets everything out of the drawers and clutters the place up again. DH never tells her off, never asks her to tidy anything, or take anything to her room. Until recently she used to walk in the front door, take her coat off and throw it on the floor!
Yesterday DH took her to McDonalds at 10.30am and she had a bacon roll (after breakfast), so when I made the lunch at 12 she wasn't hungry. Then at 3.30 she wanted a bit of chocolate cake - I had to step in and say no, because I knew she then wouldn't eat dinner. I'm sure DH was about to say yes.
I just feel so frustrated - I know it's not actually her fault - it's just that DH lets her get away with anything. I've tried talking to him a thousand times about the fact that she needs structure - proper meal and bed times, and he always agrees, but then never follows it through. His argument is that he only sees her every second weekend so he just wants to have a nice time with her.
I just don't know what to do - we've tried to make things as easy as possible for her, especially since our son came along eg having alone time with her dad, but she still plays up and lies and attention seeks.
I know how I would handle it if it were my own child, but I feel like I am the only one who seems to want to have any structure to the family - DH isn't really bothered. Most of the time I just let them get on with it but it annoys me when it starts to affect things that I want to do in the house, like be tidy or make the lunch.
Sorry if it all sounds a bit garbled - basically what I want to know is - do I stay firm on what I expect around the house etc or just let it go?