My wife and I have been best friends since we were kids (she was 5 I was 6 when we first met). We started dating when she was in her second year of high school and I was in my third. What she doesn’t know is that when I was 13 her mother took my virginity and that her “baby” sister is my first child (I was 16 when my daughter was born). My mother-in-law and I continued regularly having an affair until she was diagnosed with cancer, and later passing from it. My daughter/sister-in-law did a pedigree test and analysis in high school, where following the traits tree she found out that her absentee “father” wasn’t really her father. My mother-in-law told me about their confrontation, but my daughter/sister-in-law has yet to tell my wife. I plan on bringing that truth to my grave.