God what a little bugger!
![Shocked :shock:](./images/smilies/icon_eek.gif)
I understand that you don't want to disappoint your Son by breaking off the friendship, but I wouldn't be threatened and intimidated by someone elses kid in my own home!
I agree with what someone else said as well about his behaviour rubbing off on your Son, it's only a matter of time before he is teaching your Son to be as devious