Some backstory.... So I have an enormous family and decided to have a very small wedding (under 30 people invited). Because I am having a very small wedding I am also having a very small wedding shower. Only my closest friends and family are invited (under 15 people). Some family members that were at my baptism are not even invited.
My wedding shower is the Saturday. I came home on Tuesday to my fiancé who informed me that we would be watching his brothers dog for the weekend so he could go to an annual beer festival. This usually would never be a big deal and I am sure he did not run it by me because under any other circumstances I would have said yes. I informed him that Saturday was my shower and asked him if that meant my SIL would not be coming. He didn't know and had me call his mom.
I called his mother who was shocked because she asked my SIL to tell me she was not going to be attending weeks ago. My fiancé then talked to his brother about it who said he pointed it out to her but that that she was a big girl and it was her decision to make.
I will say we are not very close (not for lack of trying on my part), but I am still very hurt and insulted by this. Not only is she skipping my shower but she has the audacity to ask us to watch her dog so she can do so? I am certain that she asked her husband to talk to my fiancé about it so she wouldn't have to deal with me. I messaged her about it and asked if I had hurt or offended her in some way, and got a response about how its the only weekend the entire year she can go away (I call BS on that). She also immediately declined an invitation to my bachelorette party without saying why.
I am just not sure how to handle future interactions with her. Its clear that she has no intention of treating my like a sister. As of right now I don't want anything to do with her but obviously she is going to be in my life for some time.
Any help would be greatly appreciated.....