What would you do? UPDATE

So here we are with my Mother-in-law crossing lines AGAIN. We have one rule with the baby. Only one. Absolutely no smoking around him. No exceptions, especially since he was diagnosed with asthma and has to have breathing treatments every other day or so as needed for his wheezing and coughing. He's only 6 months old.

Well she has been hounding us for a while to let her babysit the boys at her house. We said sure, as long as it's free of smoke when they come. She agreed and was overjoyed. They have gone over there twice for a few hours each time without any problems. But this time was different.

I had a bit of a stuffy nose when we went to pick them up. And while I was holding my baby, my mil asked if he smelled like cigarettes. I was like "no, should he?!". And all she said was "oh good" and walked off.

So I take the boys over to visit with my parents for a bit before going home that same evening. And my mother smelled it immediately on my baby's clothes and on his skin, but she didn't want to say anything in front of everyone. That night when we got home, my baby had a coughing fit and needed a breathing treatment to calm him down. The next day I spoke with my mom and she confirmed what I feared. Because my nose was stuffed I just couldn't smell it, but I gave my baby a bath and made sure he was in freshly cleaned clothes. I told my husband and he was furious. He hasn't spoken to his mother yet, and he asked me to dodge her calls and texts until he has calmed down enough to have that conversation with her.

I am fit to be tied right now.

What would you do in this situation?

Update:

My husband has been out of town for work, so he hasn't actually been here since we picked the boys up that night. He went from being so mad he needed time to calm down one day, to not thinking it was that big of a deal the next. He chatted with his mom about it, but there was no scolding, no yelling, barely a disagreement. I was so mad and disappointed in him, I nearly hung up on him. I am not ok with this. I am not ok with her deliberately breaking her word. I am not ok with my infant's life being put at risk. I won't be letting my children go to their house until I feel comfortable with it. I won't let them watch my children unsupervised until I feel comfortable with it. Hell I won't even have them over my house to visit until I am fucking comfortable with it. I will not accept that their cravings are greater than their own will to be with their grandchildren. I will not compromise on this. I don't care if I look like the big bad mama bear, my children and their health comes first. It always will. And I don't care who's feelings I have to stomp on to get that point across.

To be continued y'all. This isn't over yet.

Here's a picture of my little man and his big brother