I told MIL and FIL when I was 16 weeks that I wouldn't be having any smokers handling the baby. At all. MIL has quit, she was going to anyway. FIL understands, and we had quite a good conversation about it. He knows that this isn't just a ploy from us to try to get him to quit - this is something that we truly believe in. I don't know what he really thinks at the moment - he may think that we're not serious, and we'll change our minds down the track, but I won't. This is not about him, and it's not an attack, it's just me being very protective.