Any Polygamous/Polyamory Houses?

In my current save I have a character that I play as though he was a vampire, using a mod in which I can disable aging for selected Sims while letting everyone else age. This guy is quite the player, he is married to his soulmate wife but they have an open relationship and his Player trait prevents jealousy. He does however get jealous about his wife's lovers, but I actually use that in the story because although he has many lovers he doesn't like to see her with anyone else. This character has like 20 children in my town, lol.. 6 of them from his wife. He recently moved in his girlfriend who is also played as a vampire, now that his wife is nearing the end of her life. It's not exactly a polyamorous house, but still very much "alternative relationship" gameplay. I have played true polyamorous households in the past. I like keeping my Sim families varied as I get bored with the routine hetero married couples after awhile.

Now I just really need EA to give us vampires... And toddlers, of course. I can RP my Sims as vampires, but it's not the same as having true vampire gameplay. And the toddlers I would like to have for a more interesting family dynamic. I have a toddler son irl and it makes me miss them in the game a lot.