Thank you,G. That's how it was beginning to look in my mind, too. I just have to prepare words and my confidence to carry it out. And I'd like to do it ASAP.
As Puppy so kindly noted, and others tried to point out, other than physically finding them together in a bed, it doesn't take a genius to see "something" is already or about to happen. Though I may be allowing "hope" to skew my vision, my nature is still telling me I may not have enough concrete evidence.
I'd rather not "wing it" and hope I'm right (she'll deny, evade or attack) so I better have "the smoking gun". On the other hand, I'd be more comfortable in the long run (not that it's necessarily a deal breaker) if I can catch it BEFORE it's a PA.
I think I'm going to tail her tomorrow and see if I can get one more shred of evidence. PLus, I may call my long time associate who also works there (he knows her as well though) to see if he can lend any input.
I'm online all day (working? from home) so I'll take all the recommendations I can get today. It's looking like a hairy weekend ahead.