A Night of Passion Beyond My Marriage

I'm a married doctor in my late thirties. Recently, I had an intense encounter with a patient, Sarah, who’s in her twenties and has a wild streak. We met for what seemed like routine follow-ups but ended up connecting over our shared interest in exploring new sexual experiences together. One night, after hours of deep conversation about fantasies and desires, we took the plunge. It was electrifying, raw passion and vulnerability intertwined. I couldn't stop thinking about it afterward, wondering if my feelings were just a momentary lapse or something more. Should I tell my spouse? Is this just an anomaly in an otherwise stable marriage?