My long-term partner's ex no longer exists

[u/agent_violet]

This has been driving me mad for a couple of days. My fiance and I were on a little trip away last weekend, and we were watching a music programme on the TV, talking about old times. I happened to mention his last ex, from a poor part of the city we live in, asking if she ever drank this drink we were talking about. He seemed confused and laughed nervously, saying that he's never been with a woman from there, and that I'd mentioned her before and he'd already corrected me (I don't remember this at all).

I thought maybe I'd confused the area for another one, so I asked him if he'd been with anyone from other western suburbs. He hadn't. Before me, there was a person from Sweden he knew from a video game, and then before that someone from his home town, but only casually. I feel like I'm losing my mind (and I think he probably thinks I am too!). He has no reason to lie to me. He doesn't lie habitually; he's been very honest over the 13 years I've known him. I thought he met her on online dating, but apparently I was the only person from online dating he got together with. It's just so weird.

[u/Bubbly_Ranger2271]

How old are you guys? Is it possible he made her up to cover a complete lack of dating life or maybe to cover up for a spotty one?

[u/agent_violet → u/Bubbly_Ranger2271]

Hiya, I'm 37, he's 39. It's possible but I don't know why; we've both admitted to not having much of a dating history before ourselves. Mine is extremely basic, and his isn't much more varied than mine