I have one vampire household that is Dracula and his three Brides. He romances each one and it causes a little drama between them, lol. Sometimes they fight to see who is the Alpha Bride. It's a blast to take the four of them out hunting together. Sometimes they go to parks, sometimes night clubs, and one time they hit a restaurant and drank the staff. :D I always let them drink deeply because they're Vampires and they don't care how many Sims they leave lying around, butts in the air. Taking screenshots of the carnage is a blast. >:)
At some point, Drac decided that he wanted an heir. Specifically, a son. So there was a lot of woohoo in the coffins until each Bride produced a child. They were all daughters! Well, he isn't very happy with them so he's been secretly dropping by Lilith Vatore's place to see what he can get out of her. Oh, he's such a scoundrel! But as it is now, Bride #2 was the first to give birth and she'd had twins. The first born twin, Carmilla, is the rightful heir, but her sister, Claudia, is a little wild and rebellious. I still don't know if the twins will lead an uprising against their father and empower the entire female household, or if there will be strife between the sisters for the heir's throne. Then again, if Lilith begets a son to ol' Drac, he might abandon the lot of them. He's so wicked! :D
Good times. I highly recommend trying it.