I think it depends. It seems you are allowing some of the succubus to develop relationships with the players so I think with high level friendship or... high favorable relationship, or ownership, whatever it is you're going for, players should be able to go back and forth or the middle ground without much problem with minor issues. If the relationship didn't exist or was really bad, I think the consequence should be worse. Perhaps there could be a way to do it as you get stronger and build alliances, or a way to do it without anyone else but an item to help you.