Maybe I am wrong, and SMW correct me if I am, but I think the main focus of SMW telling her H what was going on with their kids was for the sake of their kids and the impact his actions were having on his relationship (or lack thereof) with their children.
It appears that it has had a positive effect in that her H is already stepping up the amount of time he is scheduling to be with his kids and the involvement in their lives.
As a parent, I think that SMW had an obligation to let her H know the emotional impact his actions were having with their children. I do not think she did it to guilt/shame him in to coming back to her.
