jeanne, while reading this very sad story, I can't help but think at how BRILLIANT your daughter is and how she so DID NOT have to resort to this huge betrayal and theft of you who loved her so much. With her mind she could have started her own legitimate business and made her own money. It was not in any way easy to concoct this deceit. Most of our difficult children have the impulse control and foresight of a challenged chipmunk. Your daughter thought and planned and did and succeeded, in a negative way.
I wish you well, hope you get to the bottom of this, and then move on with your husband to spent the rest of your days doing nothing but treating yourselves like royalty. You deserve it.