You would think he would have had someone read it over and point out problems. Then again maybe he did and had the problem of it only being read by like minded people.
I read it as meaning 20 minutes of his action when compared to the rest of his life. to which i thought “Holy fuck - did you not pay attention to what happened in those 20 min”
If he meant the other valid interpretation as “hey it was just 20 min of sex it is no big deal” I think there needs to be some investigation of the fathers past actions to see how many 20 min of action he has had with people agains their will if that is his attitude.
…or maybe those that proof read it had a good laugh at the ambiguity of the meaning. The complete disregard for the victim is horrendous. I wish I could say it was unbelievable but unfortunately it is not.