Well, whizzed. You've said your piece, and she knows where you stand, and you know about the OM. So, if you want to proceed/continue with DBing, there's no need to confront her further. It's very hard to stop snooping - it was hard for me. I was counting the minutes, then days, without looking at text usage on cell phone account. It gets easier with time.
The WAS needs to make their choice, on their own, and there is often a lot of confusion and reversals in their opinion and reactions toward the LBS. That's why consistency is so important. Every time she sees you, you have to be on track - even if you have to fake it until you make it at first.
I recommend The Divorce Remedy over Divorce Busting, but both are good. Definitely read/study the book. The forum is good as a supplement to the book, but I think the book is essential.