Just to set the scene and give the back story, EXH left me and DS 18 months ago after having an affair with one of my best friends (who was also our next door neighbour!) and blamed everything on me. DS is with me but goes to his dad every other weekend and one weekday evening per week. We live in Cyprus and whenever any family come over they stay with me as they come to see DS (meaning my in laws).
DS will be 8 next weekend and we have planned to go to the local waterpark with one of DSs friends and the inlaws who are here visiting at the moment. EXH has said to his mum if he would be allowed to come with us and I really don't know how I feel about it. We get on quite well still but I think I would feel very on edge having to put up with him for a full day without being a bitch by the end of it but then I feel bad if I say no as I know that DS would like him to be there.
I really don't know what to do for the best, any ideas or advice?