My six year old son has been playing with a girl in his class for a while.Am not really friends With her mum but we do talk abt general things when we meet.The other day they were playing and my son kissed her on the lips.I told him not to kiss on the lips but cheeks.the mum didn't say a word. this Friday we met at the school gate and my son hugged her,I could see her mum wasn't happy(I don't know where he learnt that from or if he knows what he was doing) so I said I don't think they should be playing together incase he offends her.Told my son not to hug or kiss friends but I don't know if he was just been friendly or knew what he was doing.Am I a bad parent if my 6yr old behaves like that?