Chain smoking friend around baby? WWYD?

[strawberrybodybutter]

Hi everyone, just looking for some advice. My baby is due in a few months and just wondering how / if I need to raise this issue with my friend. She is a chain smoker, roughly 20 a day habit. I only see her about once every month or so, but as she lives about 2 hours away she always stays over the night.
She always smokes outside when she stays but obviously brings smoke in on her clothes and I do have to remind her to shut the door to stop smoke coming into the house.
I was reading medical advice online that people should change their clothes after smoking before holding baby, etc and stay outside for a while before coming in after cigarette.
So my question is, 1) what do I need to know about protecting my baby from 2nd hand smoke 2) has anyone crossed this with friends and how did you tackle it?
My friend is very much of attitude that 2nd hand smoke doesn't do any harm as her Mum smoked and they all smoke in the house, etc. I can see her potentially thinking I'm over reacting but I want best for my baby and not sure what is a normal approach to this situation?

Yeah, I am now thinking I won't be having her stay over again and we will meet up somewhere in between. I am conscious that there is a lingering of cigarette smell in the house after she has stayed, mainly in the room she stays in and in living room and that is just her bringing the smell in off her clothes. As I said she is what I'd class as a really heavy smoker and has usually had a couple before breakfast. It never used to bother me, being an ex smoker myself but now I feel really conscious about it.
I was also getting uncomfortable with her touching the clothes I'd bought for our baby as they got cigarette smell on them off her hands and I ended up washing them again. Probably ott but I just want everything to be clean for my baby. That's what started me off thinking 'oh my god, what am I going to be like once the baby is here?!'
I don't mind if we're out and about, it's just the lingering smell in my own home I can't stand, so it will be easier to meet elsewhere.
I don't think it would be realistic to expect someone who smokes 20 a day to stay at house for over 24 hours and either not smoke or have to change clothes after every cigarette, I would never see her due to her spending most of her time either smoking outside in corner of garden or getting changed into clean clothes.