Hi Jennifer...First off, I'm very sorry to hear of the loss of your mother. I can't speak to that experience but I can keep you in my prayers for comfort and healing.
I can however speak as a mother who doesn't want her child to experience the nightmare of watching me suffer with cancer. My job is VERY demanding and as a single mother, everything falls on my shoulders, finances, playtime, extracurricular activities, every single decision. My family is 800 miles away so I am ON with no break 24/7. Even when we go back home to visit my parents, I'm there, so I'm still mom. Talk about stress. It never ends. I smoked for over 30 years and you know what? If a situation was bad, it was still bad once I finished that cigarette.
You have to think about all the reasons you want to quit...maybe write them down and your children's names should be numbers 1 and 2. Then work the EX plan. Discover what your triggers are and begin to seperate from then and when you're ready, just dive in and quit. We're all here to support you. I am 12 days smoke free and the support here has been incredible but most importantly, I was ready. The beginning was very hard and there was a day that I had to stop working and line up all my daughter's pictures in front of me to keep from smoking and it worked.
You may need some more time to deal with your mother's passing before you're ready to quit but I promise, once you make that leap, you can get through the stressful times smoke free. Also, I think quitting would be a beautiful way to honor your mother.
I'm here along with a host of other people to support you. Good Luck!