Yesterday was pretty bad

I went to a relative's wedding and my sister-in-law asked if I wanted to see pictures of my granddaughter.  It was so sad to see her and how cute she is and not be a part of her life.  But the thing that really got to me is when I got teary-eyed and tried hard not to cry, my sister-in-law said there's nothing she can do and don't ask because she can't (won't?) help.  Then she started talking about how my niece is getting married soon and I'm thinking what's going to happen if my ED comes with the baby and then makes sure I am super uncomfortable.  She's done this before, where she stays on the other side of a room almost acting super happy, while I'm trying to act like none of this is bothering me.  After what my sister-in-law said and the way she shut down after I started to tear up (I didn't cry or make a scene or anything but I have a feeling she was feeling guilty for her not talking to my ED sternly about what she's done), I'm thinking about just skipping the wedding.  They'll have a better time without me and from everything they've done since this began, it's clear that they'd rather keep my ED happy than even slightly confront her, so I'll just skip it.  She'll probably say something because after a huge untrue revelation by my ED prior to my niece's college graduation, they were upset that I didn't want to go to the ceremony even though my ED made it clear she never wants to speak to me again.  They can't play both sides.  Evidently, I'm the only one who is suffering and that's okay with them.  They want me to just keep my thoughts and emotions to myself and make sure they're not uncomfortable.  I've had ailments come up that are completely stress-related and I just don't need anymore.  Ugh!