I think I am kicking him out tonight. The more I read this, the more I feel duped.
I have said this a thousand times to other posters and I will say this to you:
RULE NUMBER ONE - ALL ADULTERERS LIE
It's what they do and it comes as naturally to them as breathing - even if they were honest previously. You must verify independently whether an affair is in progress or not through snooping - get a keylogger installed on the computer and hack into his email. Once you have incontrovertible evidence that an affair is in progress, expose him to your family and his, and expose the therapist.
DO NOT PROTECT ANYONE FROM THE CONSEQUENCES OF THEIR ADULTERY
If there have ever been times when you couldn't account for his whereabouts and if he's been acting weird then you can bet that an affair is in progress and (I'm sorry) that it's almost certainly physical.
Exposure starts the demise of an affair in most cases and takes control away from the adulterer.
After this, demand complete and total no-contact and transparency. People with nothing to hide hide nothing - you'll know if he's sincere.
Sorry you have to be here.
Me: 46 W: 46 T: 23 M: 20 DS12 DD11 DS5
W left: 01/28/08 Discovered OM: 02/26/08 W back for 9 days: 04/08 W returned 05/21/08 EA/PA - 01/08-07/09 W's MLC 2008-2014 (realised this much later)