no fumar 🚬🚭

I am 33 years old , married , I have 2 humans already and I'm 35.5 weeks pregos with nugget number 3 . My mother and I have never been able to get along since I was probably 16 . She's always had an issue with everything , she's doesn't respect anyone ( mostly me ) and she has massive control issues . Anyways , we installed our car seat this week and she bought herself a base for her car . I appreciate the fact she did this - however,  she is a Heavy smoker and we are not allowing our child / children in her car for numerous reasons . You want to smoke outside - fine . Well ... this caused a massive fight and her calling me an insensitive b*tch . Which I've heard worse from her but I'm not allowing my daughter / kids in a car with cigarettes/ smoke . My hubs agrees with me and this of course set her off more & to be honest - I don't care . Too bad . Build a bridge and get over it because their health comes first . Am I being totally unfair ?