thanks for all your replies and some sympathy...its good to have people out there who do understand it exactly as it is.
For those that asked, DSD is nearly 18, so practically an adult. I do read about how you should always make a child feel welcome in both homes etc, but FlyingInTheCLouds - when i do my best to make her feel welcome, and to a clean and tidy environment, with her basically being able to do as she pleases, come and go as she likes etc, but i get treated like dirt, and shown no respect, then im sorry but I really am not bothered if she feels welcome or not. To be honest it is tempting to just tell her that while she behaves like the spoilt nasty person that she is, she really isnt welcome in the home. Would anyone want welcome her into their home?
Regarding last night, my DH's usual "lioness with cub" approach changed to being on my side for once, he told her we had plans, and took her home. Apparently the only reason she didnt want to go to her DMs was she couldnt be bothered! Its not like he was even asking her to walk, he offered her a lift!!
And hey, if she is allowed to be selfish...why cant I, do I always have to be the adult?
Who of you are helping to raise DSC without having any kids of your own?
Sorry for the essay..just really had enough of it all right now.