I am married to my late Husband with a daugther, he fell sick for months and non of his siblings came to assist us.
Despite my effort and and that of his friends, he finally gave up. that same day he gave up, they(his siblings) started asking for his car keys etc.
note; we are culturally and legally married.

thanks in anticipation.

so what help do you need?

dont give them any car key or house key or property document, unless he put it down in his will. You are legally married and u carry on where he stopped.

Get a good lawyer.