Quick update. She's gone to the office twice since and I've sent the recorder hidden in her bag both times. I am guessing their schedules didn't line up either time because she made a point of sending me texts letting me know she got there, along with a selfie to "prove" she was in fact at the office and not sucking a cock in the parking garage. She has several days in the next few weeks she has to go in, so I suspect I'll get some juicy recordings soon.
The other night we were at her dad's house for a family get together. Everyone was hanging out in the back yard, I went inside to grab something for her. When I came back and was approach she was talking to her sister. Neither saw me approach and her sister said very point blank "Why are you cheating?"... my wife froze, like she didn't believe what she just heard, and asked "what?"... the sister repeated "Why are you cheating?".. my wife was dumbfounded... I stood there frozen not believing what I had just heard.
For background, I've been chatting up the sister (younger) on the side. She's admittedly a bit of a cuckqueen so I've also shared with her my wife's infidelity with the hopes that perhaps we could involve her in some play. I'd shared the tidbit about my wife's recent cock sucking session with her a couple weeks before, but my wife isn't aware I've been talking to her about it (or that I truly know for sure). So hearing this stopped me dead in my tracks.
However, it turns out the sister was referring to my wife talking about starting some weight loss drugs and "cheating" was meant in the context of drugs vs. diet and exercise. But based on my wife's reaction I'm almost positive her mind went straight to her slutty activities (just as mine did).
I'm going to message the sister today and see if she thought the same thing.