AIO-I don’t want our baby exposed to cigarette/weed smoke

And I do mean they smoke religiously. To the point to where when we have visited their house, the whole place smells and reeks like weed and/or cigarettes. His mom smokes all the time, her whole apartment smells like weed. Last Christmas she gave me a set of pajamas (I was pregnant at the time) and couldn’t wear them until I washed them. At the baby shower, I received a blanket from his Aunt that absolutely reeked like weed as well and so I had to wash that too. Every gift got from them that was washable, needed to be washed because of the weed smell and I don’t want my baby exposed to it.

I know that 2nd and 3rd hand smoke is a thing as well, even at Christmas last year when I was pregnant they smoked in front of me… inside! I had to excuse myself several times because it was giving me a headache and it was cigarettes. I had to wash all our own clothes that we had stayed the night in because their house reeked like cigarettes and weed because my fiancé’s grandparents smoked inside here all the time (long story short but we live on the same property. They moved into my fiancé’s house when we moved last year because of his job and then we just moved back after remodeling their single wide nicotine-damaged trailer), needless to say it was a rough night and I had a headache the entire time.

My fiancé… has extreme survivor’s bias. “They smoked around me and I turned out fine!” “She’ll be exposed to it eventually so may as well start now” 😳 I’m sorry… what? I was too but that doesn’t mean I want our baby exposed to it because I now know the damage it could do. Yesterday his mom was over and she was talking about how no one is going to be able to smoke here because some family members are going to be staying over at his grandparents and they don’t know they smoke. My fiancé then said “They can smoke over here”! I didn’t say anything in front of his mom but I’m so bothered by it. He knows I don’t want people smoking anywhere near our baby. I don’t know how to approach this because I already know he might blow me off or downgrade what I’m saying and I’m deeply bothered me how he doesn’t seem to care. Whatever they smoke, the residue/smoke smell, not to mention the chances of it blowing inside when they want to come back inside, will be all over their clothes, their hands, face and yet everyone is going to want to meet her? Possibly even hold her and I’m soooo not comfortable with it.

She is only 5 months old and we’re hosting Thanksgiving because our place is the only place big enough… I’m not really looking forward to it. How can I approach this situation?

I have already explained to him countless times I don’t want people smoking around her and it feels like he doesn’t care. :/

Sorry for the typos, every time I try to edit towards the top it won’t let me because it keeps bringing the cursor all the way to the bottom.