I understand you not wanting to get the kids' hopes up yet. They have eyes, they can see you two are spending a lot more time together,I think that is enough for now...
I know you are grieving the old M. Just remember that some of the choices made during the old M led to where you are now...so be glad that THOSE parts of the old M are gone. Although I am sure you want to get back the love, tenderness, etc that you used to have in the early years.