If the adult brother doesn't have legal custody of the adult sister (if she were severely disabled, severely retarded, etc.) then he's not legally responsible.
Simply because you haven't shown them you're capable of making responsible adult decisions. There are plenty of women who'd rather have big brothers for safety.
Parents shouldn't be responsible for adult children.
The estate is responsible for the medical debts. The exception would be if the children were the insurance holder or co-signed the medical agreement.
to provide adult mentors to boys and girls in need of them-apex
yes definitely!
The age of majority is 18. After that they are considered an adult and responsible for their own choices.
An adult is responsible for his own agreements, unless another person co-signed or signed as guarantor.
Parents are responsible for their children until they reach the age of majority or are emancipated.
It is not the parents, but the estate that is responsible for any remaining debts. That will include medical bills. If there is not enough in the estate to cover them, someone will not get paid.
Yes unless they way over 200 pounds
Probably not. They might be in some circumstances, such as if the adult children were developmentally disabled, but where the adult children live is not really a factor.