25mlc speaketh the truth. It's hard to back off, but as much as you'd like to have been the fly on the wall - you aren't. As much as you'd like him to tell you what got said - he won't. Bottom line is, it's actually not your business to know (at this point).
Been there done that. It's soooo hard not to pry. What can you do to distract yourself?
** Purple
As soon as you trust yourself you will know how to live. Goethe