I do think the coworker is needlessly annoying but I do wonder why she knows about the marriage? Wouldn't you just tell people in your family about the courthouse marriage? Why would you tell coworkers? I also rarely used the words finance or husband and instead just my DH's name, so why would finance come up so much that it gets a lot of comments from coworker? Why not just say "Mike" if you know these people enough to discuss your wedding why don't then just call spouse by name?
At my organization it's a very friendly, talkative environment. I'm really close with some of my coworkers and we usually spend lunch hour talking about our lives, inside jokes etc (actually, we rarely talk about work which is nice) so people just tend to learn about each others lives. When I started working at my organization DP was still overseas so when people asked about him being far away, it usually instigated more questions. I definitely didn't start with "Oh, you like blue? My Fiance
wore blue once" "Oh, want am I up to this weekend? Hanging out with My Fiance
"(imagine this said in over-the-top snooty voice for comedic effect) I just brought him up, let's call him "Danny" and people would ask follow-up questions so it came out that we were engaged (at that time, only engaged because he was still abroad).
What is interesting is that originally way back in the past before we got engaged we were contemplating not telling people about the visa situation but I quickly learned that the first question out of everyone (friends, coworkers, acquaintances, even strangers) was about his visa status and how he'd be able to stay in the U.S. The prospect of lying/being misleading/evading questions about his visa makes me very uncomfortable, so we just started answering honestly because people would ask. It's odd, but seriously it is the most commonly asked follow-up question.
I was chatting with Tanya today and she brought up my wedding and then added, "but you are already married" and I (in a cheery tone) started to use Slartibartfast's wording and she literally cut me off to change the subject. It is just silly, so I'm not not going to pay any attention to her about it moving forward.
Tanya: Oh how are you feeling? Your wedding is so soon!
Me: I'm fine, just small details to work out.
Tanya: Well, I mean you are already married.
Me: Yeah, we had the courthouse marriage because of the visa and now we are having a wedding ceremony with our friends and fam-
Tanya: I'm so excited to go shopping this week with my friend (starts talking about clothes store).
I will just bean dip with her moving forward.