My SIL has openly told me and my H2B she dislikes us. After 2 years of problems between us I asked her to be the witness at our wedding. Her response to this was to tell us she didnt even want to come to the wedding as it would be one of the hardest days of her life. Six months on, having not spoken to either of us (and ignoring our childrens birthdays) my MIL tells me SIL has decided to come as people will ask questions if she isnt there. H2B wants a quiet life and says he will simply ignore her and that it simply makes her look stupid. MIL (lives with SIL) is probably behind the decision change and says SIL will not do anything to ruin our day. I am fuming, feel like I cant even decide who comes to my own wedding! Dont want a MASSIVE family row a week before which is what will happen if I demand that she doesnt come. Therefore I have little choice but to go ahead and try to do same as my lovely H2B and ignore her. Quite a big wedding so there will be plenty of people around who will actually be happy to be there. AIBU????? What should I do? It is so typical of her to commandeer the situation like this.