I would see this automatic sex system to replace these random events.
A disobedient but horny slave might ignore the autonomy settings and have sex without the master's permission. When they have a violent personality, they might even do it with characters who didn't consent. In that case the player should be able to decide how to handle the incident. Punish the disobedient minion? Break them up but do nothing? Let them? Join in?
It would also be nice if you could somehow increase the number of interactions per day without manipulating the code.
Is that somehow related to this topic? If not, you might want to start a separate one.