It is possible to continue on past an affair. We are over 15 years post affair. But it doesn't mean it's easy or the stress and suspicion is gone. My advice to anyone who ends up in this situation is to WALK AWAY. My decision to continue the relationship is not one I'd choose again if I had my time over.
Here is a post from my perspective I wrote on an old thread a bit ago:
"We are over 15 years post affair. I have not forgotten. I have not forgiven. I try not to think about it much of the time which takes effort. It consumes me at other times.
When it happened I was not strong enough to walk away. My advice to anyone else dealing with it is to walk away because you will never forget and it will be a "thing" forever. It's not that I want it to be or intentionally let it consume me, I wish it wasn't this way. But it is and its how I live. Even if I left now, I'm damaged goods. I have too much "baggage" and could never trust again.
My husband doesn't know I still struggle with this. I keep it to myself. But it is part of the underlying causes of my mental health as it is today.
Won't go into all the details of the who and what but it is why I have always been very vocal about affairs never being ok, never being the answer and advise those who are involved in one or thinking about one to leave instead of stooping so low as to be one of these selfish people. Those who have affairs for whatever justification they choose to use as an excuse have NO idea what it does to the other person long term, how it affects them often for life and how unfair their actions are. And they are just excuses, people always have a good excuse in their mind as to why they had "no choice" but to have an affair...give me a break there is always a choice. You can choose the right thing and walk away before starting anew or you can be an asshole and lose all self respect and cheat.
IMO it's too late for me. The best years of my life are behind me and this is my life from here on in until I decide to end it for myself or live it out, I go back and forth between the two regularly but I have kids I don't want to leave in this world. At the moment I'm going through a particularly bad patch. I will still always be vocal about cheaters and how there is NEVER an excuse to cheat and advising the other party NOT to tolerate it. It will plague you for life, even after you leave if you did so, you will never forget and always be wary of anyone new.
This is the repercussions that some of us live with because of selfish cheaters who have only thought of themselves."