Guest Invite

No, it's not "wrong" of you to not want to attend. While it's a possibility that your friendship with the couple has strengthened between the initial invites going out and now....from the info in your post, this seems like B-listing to me. I've been B-listed before, and I personally feel that it's a back-handed compliment.

I don't think it's wrong of you to not want to attend. It's totally your decision. If not planning to attend, RSVP "no". You don't owe any explanation for not attending.

I don’t think it’s wrong to say no !

Yes definitely not wrong to say no. Just RSVP with regrets when your invitation comes.

As someone on the other side of this I'm going to throw out a different perspective.

There is a couple I put on my original guest list who I had no contact information for (older couple from my college church). Did my best, couldn't get it, didn't send them an STD. I have since seen another friend from there who was able to get me their address, so they have been added. I'm guessing lack of info isn't a problem in this case since y'all have mutual friends.

There are also some people whose names were thrown around in planning but were left off our list because it was just getting too big. I guess you could say this was a B list, but we never planned to send them invites, they were just "unfortunate cuts". Since Covid (assuming we don't have gathering restrictions), some of these people I plan to add to our guest list because life is short and unpredictable and screw it, I'll spend the extra $$ to have them there.

A lot of people's priorities have changed during this. Maybe you're on the B list, maybe she decided she really DID want you there.

There is definitely nothing wrong with saying no.

If you never were particularly close, in spite of seeing each other with mutual friends, why would you have gone before, and why would you go now? Simply decline. You never know, someone may have pointed out you were the only ones in the group left out, and they may have felt bad and invited you. But either way, if you don't feel close, say no, thank you.

An invitation isn't a summons. If you don't want to go, just decline when you get the invite. You don't owe the couple an explanation.