There is a lot of questioning after such disclosures, my own FWS lied for 9 years about her actions one summer, over a period of 2-3 weeks, and those lies and inconsistencies led to much doubt on my end about many things.
The the false confession, which was terrible, then the true confession, six months later, which was worse because she'd been lying about having an affair and the details of the affair, meaning I now got to experience a "fake affair" and a "real affair disclosure". WTF!
I've learned a few things over the last 10 years since that spring, summer, and fall, things I never wanted to learn.
But one thing has struck me as particularly important when we deal with this. The "plan", which some posters will refer to, usually doesn't really exist in and meaningful way in most affairs, Plan A, Plan B, Plan C, etc. There usually is a lack of a true plan. It is often a chaotic fucking mess created by rootless, insecure, and immature behaviors leading to Nowheresville. The thought processing that goes into the decision making makes one cringe if you look at it from a mature perspective. You can read all of my postings, I've disclosed a lot here, and IF there was a plan it was so seriously flawed that any 13 year old with any head on their shoulders at all would realize "this is seriously fucked up".
I'm still with my FWS. She understands what she did, why she did it, and the roots of the behaviors that led to it.
You are just starting that journey. It is HELL. Now, you need to determine if she is authentic now, is she telling the truth now, is this all there is, etc, etc, and that is not easy, particularly after all the lying.
My wife knows that if she lies to me again, about anything, I will never speak to her again, I will immediately file for divorce from her and cut off all contact because I would have to do that to protect myself from any more emotional damage. Another poster said affairs are made of the cheating and lying, and the truth is that the lying, to manipulate, is the part that causes so much damage, the gaslighting and trickle truth are hell on earth.
Good luck, come here and post, read, study, it can help a lot.