Sorry if this is me being insecure. Genuinely just a bit confused and feeling a bit uneasy so would love to know if I'm being unreasonable.
Long term serious relationship with my partner. We own a home together. Met 10 years ago and we've discussed marriage, I'm keen, they are open to it.
They mentioned an old flame early on, when we were discussing our first/early sexual encounters in the way people sometimes do. But this was nearly a decade ago, and they've never really mentioned them since.
Recently they casually mentioned they were meeting them for a walk and a catch up. I've never had reason to believe anything is up so thought nothing of it, though our sex life is going through some problems at the moment and I guess it seemed a bit off in some way.
They also mentioned a few weeks later maybe we should invite them over for dinner since they live less than an hour away. I understand from a mutual friend that the person is fairly newly single after going through a divorce.
Maybe I'm projecting, as love and rust my partner, and they've been open with me in suggesting we meet up with them together.
But...we are having a family gathering in a month or so, and were discussing the invite list tonight, and they mentioned this persons name again!
This is someone never mentioned at any of our birthdays, house warming, other family things in the past decade. And I guess if it was a full on ex maybe I'd feel in some ways less confused as presumably that would have ended more formally. The thing that slightly bothers me about this is that they've not seen them barely in many years, but also it was more a young fling before going off to different colleges, so it's not like they've really hurt each other or tried to make things work.
I'm hopefully being paranoid just because my sex drive has been low (peri arm) or something but I just find it weird to suddenly want them at an intimate family lunch party when they don't know anyone else in our gang? AITA for acting surprised by this?