I am in need of unbiased opinion.
Recently, my mother had a serious surgery the same week my fiance and I were supposed to go down for the very end of a small vacation with his mom, her boyfriend, and his sisters. But it didn't turn out as planned. His one sister was leaving before we would have been down there due to work, and the other decided she wasn't going because she didn't want to make a 6 hour drive.
So 2 days before we were supposed to leave, my sister who was supposed to care for my mom that weekend had an emergency with her children and the other who had given birth a week before to her 4th child, was having heart complications due to a rough childbirth. My Father had to work those days, and take care of his dying twin and so he wouldn't be there. So obviously, I had to stay home and care for my mom (cook, clean, help her bathe, etc.). My Fiance decided he wanted to stay to help me because we have two cats which I still had to get home to fed, my mom has a dying dog who is incontinent and we are always having to clean up after him, and he just wanted to stay and help with anything I couldn't get to. I told him to just go ahead down and I would be fine. He decided to ignore that and stay home anyway. So the next day he gets a long text from his sister telling him he needs to get his priorities straight because my mother is not his mom and this vacation is more important than anything (mind you she didn't want to make the drive, and I found out the other left early to join her on a little vacation where she lives). Then he explained to her he decided to stay to help me and his Mother in law to be, and she started cursing him out , long story short she said to him Im a Selfish B, she wants nothing to do with me, and she can't wait for our divorce...
Her and I never had problems, we were friends, and she is a Bridesmaid. It is 1 week in a half later, and she has yet to apologize. I know I did nothing wrong, My mom needed my care and I told my fiance to go. But now there is a lot of tension. I even apologized to her for not going and explained what happened and asked her to convince her brother to go, but she has not responded for a week. Now his other sister and I are fine (that left early), but there is tension between us all and since the sister that cursed him out is hoping for us to be divorced I feel uncomfortable with her being in my Wedding party.
What do I do? both of his sisters are in the wedding party but the one said some awful things because I had to take care of my Mother..and won't even talk to me. I am lost.
--I edited to update that I got the answers I needed , thanks everyone!