You should not be irresponsible with family finances.
Joseph and his wife, Kate, are saving up for a vacation, but Joseph finds out about a classic car that's for sale.
Joseph wants to buy a classic car.
Joseph does some work on the side to save up for the classic car.
Joseph uses the family's vacation money to buy the car.
Joseph and Kate get to go on their vacation, and Joseph also has the car he always wanted.
Joseph and Kate can't go on vacation, and Kate is very angry with him.