Risks of secondhand vaping. Please, help

Hi there,

My husband was a heavy smoker and recently switched to vaping (he wants to quit smoking). When we were planning a baby, he promised not to vape at home as soon as I got pregnant. And he doesn’t vape at home alone, but when his friends visit us (a few times a week) they all vape in the living room.

I’m 8 weeks pregnant now and have to lock myself in the bedroom and stay there until they air out the flat. Every time he tells me it was the last time he was vaping near me, but does the same a few days later. I'm getting tired of reminding him about risks to our baby and even printed this article https://vapingdaily.com/what-is-vaping/vaping-and-pregnancy/ and hung it up on the fridge.

He tells me I’m exaggerating. Such insensitivity hurts me so much. What should I do to change his mind? Or maybe I’m really exaggerating?