This is shifting gears a bit but wondered what your take was if I discover there is another A. I know it doesn't change anything (although it kills my desire to pursue her anymore).
It sounds like it would be best for you to assume that she is. You shouldn't be pursuing her. That's not DB'ing. So just assume she's cheating, and let that desire to pursue go. If she is, it won't come as such a shock, and if you find out later she isn't, that's a pleasant surprise. Much better than assuming she's not having an affair and finding out she is. Detachment is the key. GAL helps with detachment. Stop worrying about what she does or says. Focus on being the best you can be. Pretend your single and act like you would if you were trying to attract women. I'm not saying you should start dating, but it will help in attracting your wife back. All the pursuit makes you look pathetic and desperate. And I guarantee you she can see it. Drop the rope, man...
Me: 38 W:31 Kids: S16(mine from previous R), D10, S9, S4 M: 10 years T:12 years BD:Jan 3, 2018 W moved out: Apr 13,2018 Filed for D: Jun 2018 D final: Sep 2019