Hang in there. You aren’t alone in it. Many of us are in the same boat -if you find it comforting knowing how many people go through exact same thing as you. Yeah the only choice you have is not to sit by her. But even that might not be a choice. I had to sit with my ex at my daughters wedding. Mind you we are both are long remarried. But both we and our spouses had to sit together. We get along however I’d rather not sit right side by side. But I wasn’t going to upset the bride.

Hope the event will come and go and you’ll do ok. Congrats to your daughter