Possible Clues:

• Teenagers' may do it money
• Mind small children while parents have a night out
• Provide care, for a small charge
• Temptation accepted by son, when his granny does this perhaps?
• Take responsibility on occasion for a small charge
• Give Mom some time off
• Look after young children
• Be tender in response to request from parents?
• What some teens do to earn money
• Look after children temporarily