I have several ideas in the planning phase and one of the most popular is the throuple option for the existing characters. More characters in the future is definitely a must.
RE: Sleeping
Well, my vision is to create a sense of ramification for all of your actions. It is a bit annoying but I think it plays fairly well into the "growing suspicion" mechanic where the characters gain suspicion daily once you pass some certain lust thresholds with them.
Also, the activities you are doing in this game is very taboo and having some consequences can make it a bit more "thrilling" as well as some sort of wake-up call.
Finally, count your luck that I didn't put a cooldown between your sleeps. ;)