hey hope ~ im just now catching up w/your sitch again. I dont know if I'd say your H is withdrawing or not. On one hand he's not one to maintain 'daily' contact, yet he lets you know he's still around daily by leaving little reminders, such as leaving things out as he makes lunch and having you come home to find him sleeping on the couch. That's enough to make anyone feel in limbo.
I dont know why they try to 'convince' us that things arent what they seem where OW are concerned - maybe it's to keep us dangling a bit......what am I saying of course it is......but I do agree, continued contact proves it's not over, even if it is on an emotional level and not sexual or R related. For me that's the hardest part, it seems they go out of their way to 'break' things off so carefully w/OP yet seem to have no regards for our feelings what so ever.
And I do agree w/you that she is being manipulative by using her D.........what a role model of a mother