WOW. That daughter of yours has some spirit!! You dun gud raising that one

Be proud of her.
About your Mom's smoking - I can certainly understand your disappointment. No doubt you feel that after all you, as a caregiver has been through - all the tears and all the sleepless nights, etc, HOW COULD SHE????????????
I have heard people say that breaking the nicoting habit is worse than breaking a heroin addiction. I don't know if that is true but I do know what many people relapse many times before they finally butt out forever.
Time for a chat with your mom. Tell her how you feel. Ask what you can do to help her make this quit her forever quit. Your kids will see that you are still there for people you love - even when they royally screw up.
You are such a caring person - I can only imagine how disappointed in her you are.
Forgive and move to helping her be forever smoke free.
Hugs
Donna