So hey, we're working on a mod based on the game
Harvest Moon. It comes in three sections, the last of which is concerned with romancing the local girls until one of them marries you. (We're being even-handed with the genders, so you can actually romance a girl, a guy, or one of two androgynous mates, and the game won't require you to state your gender.)
If we work everything out right, you ought to be able to get kids as well. We may try to find a way to make this logical for marriages who shouldn't be able to biologically reproduce. Or maybe we'll just ignore the issue and let you role-play it.
Bear in mind, we're nowhere near the NPC section yet. Still working on crops, recipes, tools and the like. Aren't even to an Alpha release yet, and the holidays promise to slow the project even more. But I thought you might like to know about it.
We'll have new goodies for the house as well. If all goes according to plan, that'll include multiple blocks that act like Chests (an Icebox, Cupboard, and Dresser or Closet) as well as a Fireplace and smoking Chimney, a Flowerpot, a Counter and Oven for preparing food (complete with several kitchen utensils, and a pot and frying pan), and maybe some other furniture. I'd like to see us come up with some distinct bed designs so you can have more than one type of bed in your house. Maybe a Bunkbed even