My dad has been with his partner over ten years and everything was fine till about 3 years ago for some reason she treats me and my sister as unwelcome guests when we visit. Its so uncomfortable, she snaps at my dad all the time and looks away if we talk about something that doesn't involve her. I personally think it may be because we're both around 30 and thought we wouldn't still be seeing my dad once a week, its like we're a liability. Anyway since we announced we were getting married in vegas its gone from bad to worse, she sent me an awful email saying I wasn't thinking about my dad who also ' wasn't enamored with the idea of going to vegas' (news to me, he was fine when we said we'd like to go if he could be there), how we were lucky that we had people going and also criticized my mum and said she wouldn't play happy families. It was awful for my dad stuck in the middle, ended in a huge row. Anyway we tried to put it behind us and things were much better for a couple of months. Anyway whenever we mention the wedding she has something negative to say. She's now said they wouldn't go for drinks with us on the evening of the wedding because its not fair on her children (who are 17 and 20}. They are getting to vegas the day before the wedding whereas the rest if family, friends and fiances family will be there 5 days before so they going to miss out on the rest, which is fair enough if that's what they want t my dads now asked if her son can be an usher so that his partner ' can feel more involved!' I feel in a constant state of anxiety around her, and have stopped talking about the weddin because I don't want constant dampeners put on the wedding and I'm dreading what she's going to be like on the day. I don't think there's a solution to this just wanted to get it off my chest and maybe get some perspective, thanks for listening x