from what I know, breastmilk is still best from a smoker. ofcourse, I would never smoke but in your situation, I think it's great you are helping the mama, based on the reality of the issue, that she will not quit. so if she will not quit and you are certain of that, what good does it do to nag over and over again "quit smoking" if she'll even avoid you because smokers do not want to hear it. I grew up around smokers and IME they really don't wanna hear it... it's an addiction! so I would encourage her to breastfeed anyway, just when she smokes not in front of her kids.