My son's friend since September has been making fun of me. Like when I say something to my children he imitates me or he would come up to me and just irritate me by imitating my voice. I didn't say anything until today. I told him to stop making fun of me or I would tell his mum in a really firm way. He normally tells his mum everything so should I wait to see if his mum says something to me or should I tell her I told off her son? Also was I right for telling him off or not?