I agree that we do not understand how our S's can act the way that they are. I have read enough on A that I do understand her behaviour. They knowingly are bringing a lot of pain and suffering onto the people that love them the most. I think they have latched on to something that was missing or thought to be missing from their life. They grab hold of it thinking that it leads them to the great place of happiness that Hollywood has painted. The reality of all of this is that place does not exist. Sure the romantic love at the beginning of a relationship is strong but that fades. I believe that having to deal with this new life it will fade even faster for them this time around. They have to deal with the pain that they caused, the new parenting schedule, and the economics of divorce. While they are in lalaland they cannot see this at all.
As for my W being a good mother yes she is always has been. Though over the last 6 months she has had no problems leaving our kids with me and going to work or take time for herself. I think my W is being more of a friend to our girls rightnow then their mother. This obviously concerns me since they still need discipline and structure in their lives, but I she is not being a negligent parent.