My friend invested $50,000 in her brother’s failed house-flipping business. On her deathbed, he pledged to repay her children. How can we claim this money?

“He wants to leave his house — worth about $200,000 with a $28,000 mortgage — to his own adult children.”

My friend invested $50,000 in her brother’s failed house-flipping business. On her deathbed, he pledged to repay her children. How can we claim this money?
“He wants to leave his house — worth about $200,000 with a $28,000 mortgage — to his own adult children.”