I don't know of a mod, but if you force the interactions a few times the dad will start taking care of the kid and feeling affection for it.

I think this will not affect aspirations and things, though.

look for blake-boy at MTS2: he has some pieces that are called "Aussie Federation Style" for decorating houses, and some of them would fit into that lacy style in your picture.

There's also some pieces at The Sorceress and Company that would fit.

And at TSR, there's a couple of sets that are explicitly meant to be New Orleans, I forget whose.