You can also look at
Long Road Home,
In a Scent, and
Freshwomen for a few more that have a bit of non-incest netori. IDK if you'll find many that also include "extraordinary passion" as well, though. At least, not many that focus specifically on that as much as something like
A Mother's Love. For example,
LRH focuses on that in the beginning, but much less so as the story gets into the 3rd and later chapters.
IaS isn't too far into things yet, but it's much more of a focus than
LRH . . . except that the MC isn't really in love with them yet. And
FW is pretty good, but much of that is college life and so college girls; but I would say the amount of MILF-centric netori in that is more in line with
Live to Fight, so maybe that'll scratch your itch.