I went to college where my father teach until he got retired, when I was on my second year I met a freshman girl and started dating. Three months after we started dating she invited me to go for a weekend to her parents country house, we would be there all alone. We went and when she was showing me the house I've noticed my father in a family photo and asked who was that man, she told me he was her father. Him and her mother never got married but they lived together for a few years. This was a complete shock for both of us that was confirmed later by our father.