Smoking grandma

I have some health issues from my mom smoking when she was pregnant with me and being in direct second hand smoke all throughout growing up.

I am planning on a family and let my mom know she needs to quit smoking if she would like to be apart of her grandkids lives. I explained exactly why I feel this way.

I feel like she is not going to stick to her word to stop. I really want to stick to mine to show her how serious I am.

Have you had this situation or something similar?

What would you do?