The Perfect Murder

Every time Ellen lit up a cigarette, her husband Bob would complain. Bob had never had a cigarette for his entire life. It got to the point that he was complaining about her smoking from the first cigarette that she had before getting out of bed to the last one she put out just before turning out the lights to go to sleep. That is when she decided that she had to kill him. The problem was how to do it without getting caught. In fact how to kill Bob without getting caught was all Ellen would think about, every time she had a smoke, she thought about the perfect murder. That is until Bob died of lung cancer from second hand smoke.