Responses
After reading your comment, I just remembered that his grandma's reverse was uncontrollable rage (wrath) while his mother became a glutton (gluttony). If the reverse was really connected to 7 deadly sins like you've said, then the one who has sloth as a reverse would really be lucky. Like, he's just gonna sleep all day, or do nothing
The reverse is obviously linked to something like the 7 sins (his is lust) I'm just surprised no one realized it earlier and thought it was a "fever" LOL