Sorry to burst your bubble, but that dream of constraining the femdom content is dead on arrival. Already Nat introduces you to another lady who wants to mommydom you, and if you go down the femdom route Anath takes on domme qualities as well. Not to mention the fact that the Main Antagonist of this game is a mad domme demon. Moreover, Nat's entire friendgroup (the popular girls) have been crafted as femdom features in various flavors. And plenty of other characters have potential too (yandere, the muscle girl, mom, principal, etc.). Presumably, as Anath gains sway and the MC's predilections are exposed, it's possible ALL the LIs lean in this direction -
as long as you make the choices that lead there. But that's pure speculation at this point.
Regardless, "Definitely would like to see it stay Nat only..." is already 100% not the case. Femdom content isn't insignificant now, and won't be moving forward either. It's not even entirely avoidable. Better to set realistic expectations now so you don't feel deceived later, you know? I get wanting the dev to focus solely on the kinks that excite you... but you gotta realize that's how everyone feels, including all the fans of femdom. The one thing we can all agree on is wanting MOAR of this great game! Anyway, have a good one