My family and I have a very good relationship with our neighbors, a single mom and her young daughter who is about 10 years old. We exchange desserts occasionally, watch each other's pets on trips out-of-town, and are generally helpful to one other. Recently, when I went to let my dog out I noticed that the neighbor and her daughter were on their back porch chatting, each of them smoking a cigarette! I grew up in a family of smokers, and it was apparent to me that this girl was no novice. I'm so disturbed by this. Should I say something to the mother? If so, how should I approach this?