Would you want to know?

When I was 15 I slept with a married man, it was once but we texted for a few months after and I don't know what I was thinking, pure selfishness.... His wife had insecurities and message me about a year after when she saw we were friends again on Facebook and asked me if anything had ever happened.. I lied. 😟it has always eaten me up but I felt like she wouldn't have left him anyways and it would just hurt her.. It's been a few years and now that I have my own husband I can't help but think if it was me I WOULD want to know.. Would it be crazy to tell her the truth know? Would it do more harm than good? I don't really see myself doing it but just wanted to know, would you want to know?