AITA for not letting my friends husband come to my Galentine’s party?

Backstory: One of my (29/F) best friends (32/F) got married last spring. Since she got married we do mostly group hangouts with her husband (38/M) my partner and some other friends. Which is totally fine and fun!

Now: I have a Galentine’s party every year for my girlfriends. Usually about 4-5 of us and we and all bring an appetizer and have wine, play some games etc.

I texted the group to let them know and everyone responded. My friend messaged me privately to say that if her husband can’t come, she can’t come and asked if he could come with her. I normally would welcome him, but no one else’s husband or boyfriends will be there and it just isn’t that kind of party lol. I told her that no one else’s partners would be there and she said that since being married they are a “package” deal and only attend things together.

I told her I respected whatever arrangements they had in their marriage and if she wasn’t able to attend, I understood. However, a few days later a mutual friend told me that they talked and she said she was hurt by the fact I wouldn’t invite him and felt I was being rude.

I do plan to talk to her about it, but just need some feedback from Reddit.

Edit: a few words

Edit #2: Because a lot of people asked - this party is held on the 13th, not on Valentines Day.

Edit #3 to add: thanks everyone who has taken the time to respond. I had a lot of anxiety about this. I knew I had done the “right” thing in my head. But then I second guessed myself. Now I feel good in the boundaries I set.

Edit #4: Galentines Day “A day to celebrate female friendship, similar to Valentine's Day but for friends instead of romantic partners. It's often celebrated on February 13, the day before Valentine's Day. “ it’s for all female friendships and not just singles.