(1) Like I said, there will almost CERTAINLY be further contact with OW, remember?
(2) Don't make this about you right this second, try to detach and have some compassion, really. What if OW contacted him? Now he is screwed, right? He's afraid to tell you, you'll freak out. OW was probably guilting him, messing around with his head. He feels like crap, etc...
How about: "Gabe, maybe I'm offbase because of my own fear, but my guess is that OW and you were in touch yesterday. If so, that must be very hard for you, and it is OK for you to talk to me about it. Let's work through it together."
