I can tell you it surely opened my H's eyes about our son and my H has since spoken, quoted many of the things that the counselor said, so I know it hit home for him, real good. That was part of my intention was to get my H to realize something other than himself right now. But the true intention was for my S and he is a very sensitive kid. I think you should just make the appointment and then let him know about it. He can either go or not, but chances are high that he will want to go. People in the middle of their own selves can't see out past their world right now and it is good to bring them out of that a little.
Hope that helps.
Me:49 H:47 S: 16 T:27 M:25 My EA: 2001 His PA: 10/2007, 6/2013 Separated, but H still in house
Find your Shambala: a place of peace and happiness.