Your parents are probably still a bit shocked at the news. As always, parents will do anything to protect their kids (no matter their age!). My mom was a bit standoffish to my H when his A was first revealed.
I think if you continue to have the 'nice' attitude toward him that they will, too ... I hope. But if they love their grandchild as much as any grandparents do, they'll do what is best for her. Your H will have to expect cold shoulders from them for awhile. They'll also have to realize that if you do D, he'll still be a part of the family because of your daughter. He's her father...
On another note, sounds like your H is still on the fence a bit...
