Sad and disappointed

I went to a celebration of life with my husband for a member of his family. He was introduced to everyone while I walked behind him (carrying our baby) and I was not mentioned once, I was not introduced or even acknowledged but people did talk to my 6 month old.

My FIL also shows pictures of my husband and our daughter to everyone but not ones with me in them.

I don't exist because these people are so self centered and rude. I feel worthless and like his family is ashamed of me.

I'm so sad, what did I do wrong. I never want to see these people again.