I think I'm bisexual at 52. Twenty-eight years married. Now what

There's a woman at my pilates studio. Not even particularly my type if I'm honest. She's funny, mid-forties, slightly mean in a way I find charming. We had coffee twice. The second time she touched my wrist while making a point about her ex-husband and I went home and could not concentrate for forty-eight hours. Twenty-eight years married. Three grown kids. Leafy suburb of Toronto. My husband and I are happy. Sex life is fine — not on fire, fine. I've never seriously thought about women in my entire life. Watched lesbian porn maybe twice in my twenties and it didn't take. I don't know if I want to do anything. I might just want to know. But also — if I'm honest, which I'm trying to be — I've started rewatching old films and suddenly noticing women I never noticed. To the late-bloomers in here — does it pass, intensify, or just sit there permanently as a new file in your head?