How do u feel about this?

My mom smokes in the car at times with me, note I'm 34 weeks pregnant. I have asked her many times to not, but she never listens, only AT TIMES. The one time we were in her car & she was about to smoke, I asked can you please not smoke while I'm in the car, I can hardly breathe now because I have a really stuffy nose & would appreciate it if you didn't. She flips out saying "oh my god so glad I paid for this car & I can't even smoke in my own car" & "your being so rude honestly" my response was for what? Not wanting you to smoke while I'm 34 weeks pregnant, because it can cause probably for both me & my child? Not sure how that is any where near rude? What do u think about this? Am I in the wrong? 

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