This is a very old post but I happened on it. I knew your mom. She was sort of my first girlfirend. She lived with her grandparents. Her grandfather was a Professor Emmeritus in History at the University of Souther Colorado. I never knew why she lived with her grandparents. We met at a fishing camp about 60 miles from Pueblo where her grandparents and my parents would go on the weekends. She would have attended Central High School. I think she was younger than me and would have graduated in 71. I attended a Catholic High School. It is odd, I was thinking about her today so I googled it. Your birth father's name does not ring a bell.