OK, so it's a stage...I'm happy with that.
I'll ignore, and encourage play. I'm just unexperienced, so please forgive.
Twiglett, this is such a small area we are all friends, no probs talking to her so I'll just maybe try a little harder. Some (most) others don't try at all, and I always feel sorry for the one that's alone, I was a "new" girl once and I know it's never easy, whatever the age.
Colditz, I get you, but I think in this case when the dc just gets up and walks away from "naughty" area, and she does nothing about it, he's never going to get the whole idea. I know parents of children for whom there just seems no answer, but I don't think this is the case here, IMVHO she's not really trying very hard. But tbh that's really her nature, she's very much like that.
Macwoozy, to a certain degree I think this may be true, she is a SAHM and recently registered cm, with no clients as yet, so spending all day with her ds probably is a bit wearing, when my ds has a "bad" day I think to myself how awful it must be for SAHM whose children are often like this. SO I think that's why without fail she's at every playgroup there is in the area.
Fillyjonk, I agree too, if you interfere with the naps, you've had it. And schneebly, for your nephew, but hopefully he'll grow out of it too.
Thanks for your help and advice everyone, hope I don't sound like one of those "perfect" mothers to you, I'm only trying to find out how to best approach. I guess the best way is act as if he were mine, encourage good, ignore bad, and make an effort. Good to know it's prob just a phase.
(see you back here in a year when it's my ds who is acting up...)