Why would they though? It was a party for JOE. They invited a very small number of their own special family members, and his close friends to celebrate,none of hers!
Why would Hinch be there, just because they are pretend Instagram friends, or even if they are good friends. (I actually don't doubt that-I think they're mates!) I don't lie snuggled up in the arms of someone who's my. "pretend friend" I don't go to visit them a few days after their babies are born etc, and much more.)and soph had no need to invite Hinch to show off on Instagram, as she didn't have any intention of actually showing the "Party" in action, because she didn't want to get caught doing anything she could be judged by.
If it was my birthday, which was like their atmosphere, at home, and very close knit, I definately wouldn't need one of my Partners mates Husbands or their Wives being there wtf