Unfortunately there is not 100% recovery, its the biggest trauma posible in any mom's life.
Nonetheless you could do some things to minimise the suferring:
- leave a clear, concise, objective Letter
- make prepaid funeral arrengements
- leave your funeral clothes already cleaned and organized
- close all your accounts
- make a will or schedule 100% money transfer to her
- donate all your clothes
- organize all your documents
- CTB in a neutral place, where she is not the one who has to clean the mess and be the first one to see your body (example: chain hotel room)
...
Just try to eliminate all possible hassle. It will somehow help her.