I don't understand why you seem confused that he is in a bad mood.
He's been put on leave and is under threat of losing his entire career.
That right there would put most people in a horrendous mood.
I don't think it's safe or wise to try to attribute his mood as any indication of how he feels about you or the R or your DBing efforts.
Just keep the focus on you and your son.
Me: 44 H: 44 Kids: 20, 16, 16, and 10 Together/Married: 22 years H announced he was emotionally detached and considering D: 4/4/16 H announced he is going to try to stay and reconnect: 5/1/16