I agree with Nightsky2 I also find it incredible that some parents have to be so careful what they say to their children; though I do realise it does depends on the relationship you have. My children know that if I say anything to them it's with good intentions - and vice versa; they know I value their opinions and none of us takes offence if advice is offered (and believe me, their advice is offered quite often!). I hate confrontation and am the furthest from an over-bearing mother that you could find; I have a lovely very easygoing relationship with both my sons and my lovely DIL . As for the OP, no worries from me that the little one was playing out in just a nappy, so long as it was not cold outside; however if it was cold, I would have said to my son 'oh it's a bit parky out there shall I get him a t-shirt?" If my son had said that the child was fine as he was I would leave it there, and would certainly not then have a word with my DIL. However, if I was really concerned, I would probably go outside and feel the child and if he was stone cold I would have told my son 'FGS put a t shirt on him!'