Because your finances are inextricably entwined with that of your parents, their money is your money and your money is their money, so there should be no problem.
(At 17, you have not yet reached the age of majority, so your parents are legally responsible for any debts you incur, hence the statement above.)
(At 17, you have not yet reached the age of majority, so your parents are legally responsible for any debts you incur, hence the statement above.)
