Rant over sister in law***

Elaine

It is mine and my husband's first child together and we had a gender reveal party with close friends and family however his sister told us she wasnt coming because she hoped to get her bathroom done and she didnt turn up and didnt even message to say congratulations on finding out were having a boy....

I am so bloody mad about her not coming and I feel like she doesn't give a f**k about my child which has really made me angry and I've got to go on bloody holiday with her and the whole family, which I dont want to now.

Am I right being angry or am I over reacting and how would you deal with her now and going on holiday