Brian,
My thoughts and prayers go out to you and your family. This has hit home with me also as I have 2 beautiful boys, one 15 weeks old, and the other 28 months old. If something was to happen to my wife, I would not know how to handle it, but you seem to be handling this situation very well.
To end on a positive note: Congratulations with your new addition. She will be bring much joy to your life.