I feel for you. Going through it once is hard enough. Job once commented on one of my threads that an affair needs to run its course. I believe I, like you stepped in the middle and stopped it too soon. On the other end, why would you want to allow an affair to continue while you're married. It's conflicting however I think in your case, your W still had a receptor open for OM. Not necessarily a longing but basically an easy connection for OM to reignite if the time was right for them both.
You're a better you than you were the first time. You have the strength to get through something like this. Whats your plan, for you?
H37, W37 D4, S2 ILYBNILWY 9/19 BD 9/19 EA discovered 10/19 Currently in limbo, no D or S process initiated