You shouldn't take advantage of people close to you.
John is excited about a new game which is coming out but it's very expensive.
John wants to get the game as soon as it comes out.
John works extra hours at his low paying job to save up the money.
John asks his parents for money, saying that he’s raising funds for a charity.
John's parents think he is responsible and self sufficient.
John's parents find out that he lied and trust him less going forward.