I think, given your husband's immediate reaction, I'd ask for a different MW.
The fact that he recognised her, and thought it awkward, says to me that he would rather she wasn't there.
I'm not saying this means anything, just that if he's weirded out, then immediately that would change the process for both of you.
I think I'd feel the same.
Not the same at all, but you've just reminded me of something -
I once got off the same flight as an ex's girlfriend. No idea.
He was waiting to meet her and that's when I realised. She bounced along perky, sparkly, pretty, about 15 years younger..
I had flu, and was wearing the clothes I'd been wearing in meetings for 12 hours and looked like shit.
Totally didn't matter, no one else would've cared, but I still remember it like yesterday...20 years later!