I feel for you. I have a nephew and niece who just don't know how to behave. I actually had a chat with their father about it recently, he said "yeah I don't think they really have a concept of what good behaviour is" as if this had nothing to do with him. Funny thing is the girl, who's a couple of years older, shows signs of working it out for herself (i.e. that it's nice to have consideration for others). I hope she manages to continue - I'll do what I can to help.
2/25/13 at 12:29am