Hopefully it will come out that the father had security cameras installed, and he either regains conciousness long enough to tell the MC where they are hidden, or its in a side will, that must be read two weeks before the main one.
"I give my wife and step kids a week at bla bla resort, to help the adjust to losing me..., then notes they have to take it immediately, and as they go, the MC gets the info on the cameras... and a clause that revokes her rights to anything if she argues the will, or was involved in any way"
Yeah I know, it wont happen, despite that often being a clause with rich peoples wills.
It would be nice to crap right over all her plans though.