So these are not my parents.
Mum and dad had I think mirror wills and mum had son Joe being her power of attorney and all dad's money ie joint money went to mum. Mum has a new will with Joe being executor and possibly all money shared if she goes second ,hopefully if she goes first money goes to dad
His care home is being paid for.
Now mum has died first , does dad's original will come into play and who does his power of attorney.