'Spaw,With this much passionate care I know that you, Karen and M will find a solution, and it seems pretty obvious to me that M has formed a strong attachment to you over a long period of time so I am sure that her trust and faith in the two of you will contribute mightily to finding the best possible outcome - by that I mean that she probably already has the commitment to finding the solution herself and so you will all be working proactively together.
Keep at it, but make sure that you look after yourselves too - all of you.
Lots of love Helen