Trust is something that once broken, is difficult to repair, but it can be done. I've known several couples who dealt with infidelity. Most of them didn't make it, but a few did. It took therapy and a lot of hard work from both before things settled. One couple, after the dust settled had an even stronger bond. Unfortunately the husband passed away before he turned 50. My friend said the best thing they ever did was get back together because the cheating happened in their mid 20s and by the time they were 30 they were back together after spending 3 years separated and going through therapy. She said if they had divorced and gone their separate ways she never would have gotten to know the man her husband became. He knew he had fucked up really bad and regretted every moment he spent with the other woman. He was a great dad and he and my friend ended up having almost 20 years of a much better marriage that he nearly threw away. He was 48 when cancer took him.
So if there's any type of shot at reconciliation whatsoever, Miles and. Troy need to put in the effort and they both have to want it.
The biggest question is .... is the damn author going to throw in another monkey wrench and leave everyone guessing?