Baby Shower issue

Mari

My boyfriend and I are planning the baby shower and finding a place and making a list. We currently live in an apartment so the two options is my parents or his parents house. We chose his parents because it's way bigger and there's going to be roughly 50 people there. Am I the asshole for getting upset when the mother in law is trying to invite family that neither my boyfriend or I barely know? And her excuse is well it's my house I don't want them getting mad. Is it just better trying to find somewhere else to have it at?