Responses
You're wrong. The father really used his son's body to have sex with Shiranui, it's just that Shiranui only saw the father's face instead of the son's. Also when the other God says you have never done this before, he just means he has never taking it up the ass, which means the son was the one who did the fucking with Shiranui
WAIT. So the father possessed his son's body to fuck his partner who was also the son's father?? Excuse me but what the fuck.