Wow just re discovering this game, amazing to see its still being modded. Shame they never released a third one!
I saw somone mention an incest mod, is that a new option for character creation? I remember in Artifical girl 3 you could be related but not in this.
Yeah, you can do a shit ton with modules now. Modules change the way the ai works and can give the player extra abilities. Full list is
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Sounds like what you're mentioning isn't a mod mod but just modules, which wouldn't add extra dialogue or anything like that. It's just a roleplay thing like most the stuff in game. The incest one makes the character more affectionate with characters that have the same family name.
For extra player abilities, I recommend you put Blackmailer, Brute, Gambler, Henshin, Kidnapper, Voyeur, Shaming (Maybe), Sticky Cum (Maybe), Swift Hand (Maybe) on your PC character. Most of those are just active abilities and won't effect anything unless you want them to, so there's no risk or reason to not have them on your PC, just gives you more options for what you're allowed to do. Shaming, Sticky Cum, Swift Hands are passives but they aren't too extreme.
Basically a lot of those modules are the types of things that should have been in the base game, they aren't really immersion breaking or anything (Voyeur and Brute in particular).