I Need Opinions

So I wasnt going to have a baby shower but it turns out my husbands mom is throwing me a surprise one . well we went to visit her yesterday and when we walked in , no one was home but he stopped and looked down then looked at me and I saw all these decorations and bottles and baby shower stuff on the living room table , my husband told me " yes so we are making you a baby shower " 
But he wants me to pretend I dont know about it and im perfectly fine with that but what would you ladies do in my situation? because me ima act surprised but usually when I go over im dressed with shorts and my husbands t shirts and with no extensions I just put my hair up And also dont wear make up just eyeliner. if I go in a dress or long skirt and a dressy shirt with my hair down , wear my extensions and do my
Make up don't you think it will be weird ? Or suspicious? 
I mean I can always say my hubby told me to dress nicely because we were going out to eat or something 😜 but what would you ladies do in my case ?