How to deal with 2nd hand smoke

My mil keeps smoking and after i’m pregnant she starts to smoke at the balcony and keeps the door close. but sometimes she forgets and she’ll leave the door wide open and when i go out to the living room the entire cigarette smell will be so empowering. tonight i went out for dinner with my colleagues and when i came back she left the door open again, and my husband left our room door open so the entire room is filled with the smoke smell. i feel so annoyed but what can i do? husband also kept reminding her to rmb to close the door but next time after the kid is born she’ll be helping to take care and i really don’t want my kid to be exposed to all these smoke