What would you do If you asked your friend that smokes to baby sit your baby who has bronchitis......?

I asked a really good friend of mines to babysit my baby while I go to work for a week. I know she smokes and she knows not to smoke around my baby becasue he has bronchitis. But while she was baby sitting she decides that it was too hot to smoke outside the house she go into her laundry room to smoke and lets her baby and my baby follow her to inhale her second hand smoke! I've notice in the week my sons breathng has worsen and he has asthma as well so it was really bad at night where I stay up almost all night to make sure he is still breathing...I didn't realize that she smokes with him in the same room until we recently schedule a doctors appt together and I aske her again if its ok for her not to smoke while shes driving because of the baby..she said ok I won't. but then she calls me later and ask what make the difference in me not smoking in the car if is smoke in my house while i was watching the baby...MY face dropped when she told me that. I couldnt believe that she as a mother would even put my babys health in danger like she did when Im over here at home in the middle of the night making sure my baby is breathing and not knowing what she has done to jeopardize his health ....I can't belive she's done such a thing and had no common sense whatsoever! she even told me that she regrets telling me that she did smoke because she is now ping up the money that I was going to pay her again for another week to watch him. I was pretty pissed off and had to let her go and then maybe a frew days later I called her to tell her off because I was still in shock of what she has done to him..smoking is not a good idea with a baby who has bronchitis and she knew better and didnt want to do it outside because the sun was too hot. If that was me smoking I would of done it for her and stepped outside for a couple of minutes just to inhale that smoke while the babies are inside safe..she said she didnt want to leave them alone while she smokes so she had to take them WTF! put one in the crib and one sitting in the highchair and they will be alright when you get back,,,Does anyone agree with me with that? It only take common sense but in her case she didnt give a F*** about mines or hers. Her husband even commented and said I wouldn't stop smoking for her because its her car and shouldn't be told what to do if its her car...only out of respect if you smoke and your friend doesnt't..wouldnt it be nice to ask if it ok if I smoke? gosh common Im am talking about my babys health here....but obviously she didnt get the point so I just cut her off as a friend.