Any Polygamous/Polyamory Houses?

I wanted to create a polyamorous household, but it didn't really work - mainly because of the built-in reactions of the game. But you'd think that a combination of non-committal and romantic should work in favour of this constellation. Sims has quite strict morals and ethics, probably to be attractive in many places of the world, but especially the US. So anything that is too alternative or open-minded isn't going to work without mods, I suspect.