My brother and I are listed as equal beneficiaries for my Father's estate. He will not sign over the cash value for the expenses. What can I do?

He is almost 94 and has lived with me and my husband for 8 years. (God bless my husband). My worthless brother who lives 2 hours away visits 1-2 times a year, doesn't help at all and doesn't share in any expenses not covered by my father Social Security. The only thing left in his estate is a small amount of life insurance with some cash value.(not much) question is how can I get the $12,000 worth of expenses my father owes us before the insurance is split? By the way, my brother can do no wrong and after 8 years my father thinks my husband and I should do more. He thinks it is my obligation as the daughter. He will not sign over the cash value for the expenses. He has congestive heart failure and is about to die. What can I do? Thanks