Step daughter spoilt by her grandmother
I have a 9 nearly 10 year old step daughter who stays with us every other weekend, I also have a 2 and a half year old boy and a 1 and a half year old girl. Every time we have my S.D stay she comes with new toys from my partners mum, my children are biologically his and although they don't make a fuss they can see she has new toys which my children are not allowed to touch, this might sound petty but she also gets pocket money, stays there over night, trips to the cinema, creams and god knows what else, I'm at a point where I resent this child coming over as the atmosphere changes and my boy only ever cries in his sleep when she's here! She takes over the house and rearranges my ornaments, bathroom, cutlery draw to how she likes! I can't bear being in the house when she's here. She constantly boasts what "nannies" bought her whilst my kids get naff all and if they do get something it's secondhand! I literally do not know where to turn, my partner ignores it and says it doesn't matter, I have no family of my own around as they live over 150 miles away. I can't bear my kids feeling insecure and loved less as they get older! Any advice on what todo?