hi YoYo, just wanted to let you know that I'm lurking and thinking of you. don't know that I have a lot to suggest, I think you're doing a great job.
A couple of thoughts came to my mind though, that I might share: My H told me not to long ago that he went through all his elaborate schemes and lies to protect our relationship...and he said he was terrified he would lose everything, meaning home & us....
I've also found that when H would bring up ow, I got the best results by just looking calmly straight at him and not saying a word. he always responded in one of 2 ways when I did that: he would sometimes start talking about her/them, which gave me a clue about what was going on, or, he would shut up already! about her which meant I didnt have to listen to it. either way, I figured I gained.
The tampon stuff is weird, smells pretty fishy, I have to say. wierd no matter what was going on with/between them.
I still see many positives in your sitch, and feel that his talking to you is a very good thing.