DS age 3.6 has another friend, slightly older, very hyper and can be very destructive, but DS loves him, perhaps because of this.... We have been friends with his parents since the boys were babies. Last weekend we saw them for a nice lunch and the boys played reasonably well together So we invited him over to play this w/e.
Anyway as soon as he arrives DS and he start running around screaming hysterically, so far (fairly) normal boy pack behaviour. With all Ds's other friends, they have been fine for months now to play upstairs unwatched so we let them go. We didn't hear a thing, no ominous thumps as we were having a chat and coffee with his mum. Then DH happens to go upstairs and then comes down white saying 'you have to see this'.
DS's bedroom had been totally stripped of its contents, including all the drawers in his cupboards, and they had ALL been strewn on the floor- every book from his shelves, every box of toys had been emptied on the floor, every item of clothing from his open wardrobe strewn around, all his bedding, etc. The place looked as if it had been thoroughly done over by vandals. The mess was about 1.5 feet thick in most places. DH, friend's mum and I had to spend 20 minutes tidying it up.
Anyway, DS seemed to get that what they had done was BAD, kept saying 'sorry', trying to help with clearing up. The friend totally didn't bother, kept giggling and throwing stuff around, refused to do anything his mother said, shouting 'NO YOU DO IT' at her, etc. She didn't really tell him off, it all seemed routine to her, he has a long history of this sort of behaviour in her house,which I've witnessed.. DS1 has never, ever done this before nor has it ever happened with any of his other playmates. The mum kept saying 'oh boys always do this don't they' and citing other boys who (WITH her ds at their houses, never actually alone) had done it.
Her ds is definitely a ringleader type- that doesn't 'excuse' my Ds's behaviour at all as he knows throwing stuff around is wrong, but I do just know he wouldn't initiate behaviour like that, whereas the friend has a long history of it. Looking back, whenever he's been at the house there has been some destructive incident or other (not as bad as this though) which has been blamed on the boys' joint naughtiness. DH strongly feels that we shouldn't have this boy to play again, & I don't feel you should have to watch 3yos every minute of their playtime and it seems my DS is just too easily led into total havocmaking behaviour by him. Then, the mother doesn't really discipline her DS at all and I end up feeling really annoyed with her because she's generalising about 'our' boys' dreadful behaviour when DS is never normally like that.
Then again, the mother is fundamentally a nice person. I don't want to freeze her out because of her kid. Would you have him back to play and just watch them both like a hawk??