I feel like you are only hurting yourself more by continuing to contact OM's W like this. At this point, you know about the affair. So who cares about the grisly details? Does it matter whether they had sex 2 times or 200 times? Does it matter which things were lies? To me, every time you find a new piece of information, youre only going to do further damage to yourself and any potential reconciliation. You have the intel you need to know what you are dealing with. The details are only going to hurt YOU.
At this point the new information doesn't really hurt at all. It just is what it is. Just more pieces to a puzzle to get a fuller picture. I have an analytical mind so more information puts it at ease. OM's W is the same way and she's just trying to corroborate different information to see if he's still lying. If WW and I talk, any information I get from OM's W will do the same for me.