Halloween // Still Pregnant or Not Costume Ideas Please!

Hello! I am pregnant and my due date is just before Halloween. In the past, my family has gotten really into doing themed family costumes (I really enjoy coming up with and creating them too). My extended family Halloween party is where we most like to show these off. Now, timing-wise I don't know if I will still be pregnant on the day of this party or if I will have a new baby-- it could go either way. Are there any costume ideas you can think of that would work for either being super pregnant or not? The only thing we've come up with like that so far is the Holy Family/nativity lol. Or something where it would be easy for just me to change my costume but the rest of the family (husband and three kids ages 2-8) could stay the same and they would all still work together. Ideas? Thanks!