I guess this is my take on it all. If you know your old M is dead, why does it matter if you get a D or not? Do you now want to start a NEW R with your S? You can still do that if you get a D. She will need to see the changes over a long period of time before she might want to start at the begining again. Now, this road isn't for everyone. But it just depends on what you can deal with and what you can't.