Not quite sure what you mean by model but I use mostly the
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checkpoint for females. I've tried others but always come back to this one as it seems to be the best one for generating all types of characters.
The private room has room for one dancer/customer at a time. Each private room session is scheduled for 30 minutes and each time period is roughly 2.5 hours, so that's 5 customers in a time period.
Not with the current state of AI generation. When things in that front change I'll revisit but at this time it's not possible.
I'm not sure why you would be getting the "Is Unfaithful" modifier in that case. That gets added when you cheat with somebody and then that somebody shares that info with someone else that cares about you being faithful or not. Then they get the modifier. I don't see a way to get it without cheating. It is a tough one to see where it comes from because it can show up months after the fact on someone completely unrelated to the cheating event.
Getting engaged/marry is not available to the MC at this time.
I'll look further into the election bug. I have seen some weirdness with missing votes but usually the fix themselves on the next elections.
Secrets are things that someone learns about someone else. What they are is irrelevant but they are things others may not like and carry a negative opinion. For example, when you search someone's locker you can learn a secret of the locker owner. Small/medium/big just means how big a negative modifier they are. Bartenders also learn secrets from their customers - they get drunk and say something they shouldn't. And finally, there's the interaction that makes up a rumor about someone. This also creates a secret about someone (even though it's false). The whole point of this is to create another way to generate negative opinions and not have to come up with a bunch of specific secrets and making sure they match everyone's personality.
ama_cont_nude tracks how often someone has competed in a nude amateur contest (when nudity is allowed). It's mostly used to determine their skill, the more they've done it they better they are and the better their odds of winning. It doesn't factor into how far they are willing to undress. If they like public nudity they should be willing to be topless at the very least. But honestly I probably have spent more time trying to figure out why certain characters won't undress than any other AI action. Lewdness and greed are also factors (if they have low greed they won't care enough to do it).
Possible yes, but very unlikely. We probably need the AI generation to take a next step so that things can be automated a bit better. (I.e. given images of two characters, join them into a single image in a particular pose).
You can't propose a relationship until you have known a person for at least 60 days. I know this makes no sense for your sister that you have known all your life. It's an oversight.