Mike, some BH's get over it, and some don't. My observation is that the marriages where the R is successful, the WW is able to show the BH that he is not a "plan B" or second best, that her love and sexual desire for the H is true. She shows this not through words, but through consistent actions over a long period of time.
There is no checklist for this. It is a matter of the heart. The heart of every BH and WW either creating that new connection, or not.
There is also the reality that, for some men, certain sexual acts by a WW in her A are particular triggers. For example, there is a lot of discussion here on SI about A's where the WW engages in sexual acts with her AP that the BH had previously requested and been denied. Many men find that difficult to overcome, even if the WW offers up those acts after D-Day. In your A, there is some suggestion that she may have engaged in "sloppy seconds" sex with you. Some men find this difficult to overcome. This is personal and subjective.
Some BH have tried R for extended period, even years. In the end, they find that although they truly love their WW and wish that they could get back what they lost, they simply cannot get over the sexual insecurity/harm created by the A and they move on. In other words, D is not limited to instances where the BH hates his WW.
As a BH, your main task is to find your personal truth in this regard. The only way to do that is through working with a good IC, and talking with your WW. You will not be able to observe her actions toward you if you do not interact with her.
There is no "one size fits all" answer. The one truth, and I sense this is the truth that terrifies you, is that you cannot get back what you once had. That is gone. The path forward is to build a new life. The trauma and pain and mental images of your WW having sex with her trainer will be with you for life. You have been fed the proverbial shit sandwich, and it was your WW who fed it to you.
Every BH has only three choices in this regard. Knowing that this pain will haunt you for the rest of your life, would you rather live that life: (a) with your current WW, (b) alone, if you D and never marry again, or (c) with somebody you might meet in the future, fall in love with, and marry?
Choice (a) works if your WW truly understands your pain and is willing to to the work, for all of the rest of your years, to help you heal.
There is a very good book often recommended on this site. I always forget its exact title, but I believe it is called "How to Help Your Spouse Heal From Your Affair" by Linda MacDonald. You should ask your WW to read this, ASAP.
Also, gently, several posters on your many threads have suggested that this forum tends to work best when the betrayed original poster sticks to one long thread, usually in the Just Found Out forum. You reference the threads by Mr. and Mrs. Walloped, which are structured exactly that way. And you see, among other things, the instructional benefit to others from reading those threads.
One of the reasons this works is because thinking should be occurring in a linear fashion. Your posts reflects a scattered thought process, like somebody who is in extreme panic attack. I think you will get the best help and advice from people here if you organize yourself into a single thread and follow that. You're way too early in your process to be here in the Reconciliation forum.
[This message edited by Butforthegrace at 7:47 AM, June 20th (Wednesday)]