The product of a very creepy affair

My dad was married 2 times before my mom. When he was with his second wife, he would travel a lot for work. One night he came home to find his wife in bed with another man. Actually walked in on them. He left the room and came back with a gun. Shot the man dead, and wounded his wife. He turned himself in immediately and was sent to prison. He was sentenced to 10 years in a maximum security prison. In the last year he was in prison (which was the 4th year, he got out for good behavior, and since the judge ruled it a crime of passion), he met the prison minister. The prison minister was my mom. My dad is a murderer, my mom was the minister. I am the product of a conjugal visit.