My father passed away in 1988 leaving my mother an estate worth 1.6 million not including her house and personal effects. I just found out she "lent" my brothers most of that estate but they never signed anything. She is still going at 87 but is out of money. What if anything can be done to have them pay it back.
When did this happen recently yearts ago. Is your mother competent? I would suggest that you immediately take your mother to a lawyer to discuss the situation.