Jen, are you using any quit aids? Have you worked the ex plan? You have to want to quit more than anything, it has to be your focus for awhile....and I know how hard that is when life with kids keeps you busy. It just has to be something you want with your whole being. Go to the "Reasons Why I quit" group and read some of those posts. They are very strong and really can help you appreciate how very important it is. It certainly puts things in persepctive. I wish you all the best. Try coming here and posting BEFORE you give in to your crave. You may be surprised how helpful it is, and distracting to boot.
Remember: the craving for a cigarette will pass whether you smoke or not. I hope you will make the choice to NOT, for yourself and those beautiful kids.
Hang in!