I have been a step mom for 15 years and I can't take it anymore. Of course I will have to, but I feel like I'm losing my mind. My heart races and I am constantly on edge. I have one step daughter and it feels like I have 20. Her mother is the main source of our frustrations. It never ends, sometimes when we don't hear from her, we will live in harmony, but we know it's coming, it always does.