Think it like this: You have a sibling that is a bad gambler. They play roulette and lose big as expected and drive the whole families finances to the bottom. They then go to your parents complain that roulette is bad and ask your parents to bail them out. Your parents instead of punishing your sibling and make them repay the debt, say that it is fine please don't do it again and we don't want you to declare bankruptcy, but we will have your brother/sister (that is you) pay the bills.