My BF has 4 children. His ex wife has poisoned 3 of them against him and I have been named as the reason for the breakdown of their marriage. 2 of the children have not spoken to their dad since he separated from their mum and one of them has stopped visiting as he does not like me or my son. The reality is that they are probed for information when they return home and to come and stay with us is more hassle than it is worth. His youngest daughter who is 12 still comes to stay with us every other weekend. I have a 14 year old daughter who she adores but also a 12 year old son who she is less than fond of. Some weekends when she arrives we know it will be an “ok” weekend but other times she arrives as cold as ice and it takes her all weekend to thaw out. My BF is the most incredible dad. He is kind and patient and gives all his attention to his daughter when she is here. She is very demanding when she arrives and he waits on her hand and foot. Her hostility towards me is palpable but my BF reminds me she is just a child and confused. I know I’m the adult here but I really really struggle and it’s affecting my mental health. I completely understand my BF rationale for offering respite when she arrives and showing her kindness but I just feel hugely itimidated. Although she loves him she is hugely derogatory and full of disregard toward to him when she is here. She does everything I get path to keep us seperate during the weekend and make her “claim” on him. I rarely challenge this as I know she has need and my relationship with my BF is solid. However I struggle mentally. I’m not sure how’s much longer I can manage actually being here when she comes over. We could have such a lovely time altogether. I just feel so desperate