I don't like the "corruption" trope period, it is used in so many games as a mechanical device to indicate change within a characters mental state but it makes them seem so shallow and almost robotic. "She is being corrupted, she now has 10 corruption, careful she is becoming an uncontrollable slut". Nah, people are a bit more complicated than that, put some nuance into it.
And as for Nat, I never looked at her like she was some purified angel who is now being dragged down by Ethan's perversions.
She is just a normal person with flaws and unfulfilled desires/dreams like anybody else. This is like a sexual awakening, dormant desires are popping up left and right in her mind that she never knew she had. She is discovering another part of herself while encouraging Ethan to succumb to his own, even if it is to his own detriment. He can't control it any more, and neither can Nat.
And I think she wants reconciliation between her new sexual desires and her existing marriage with Ethan. Whether she will do that by force, blackmail, manipulation or using Ethan's desires against him. Or simply giving him a small taste of what he wants so she can later take a big taste of what she wants, slowly wearing him down and moving the line of what is acceptable.
But I agree with you, I too want to see more of Nat's thoughts and her decisions being
her own rather than them being purely influenced by Ethan or someone else. And in the sub path we are seeing more and more of that, which is good.
But we still haven't seen any real tension or drama between them, no confrontation has happened as a result of anything. Talking about the sub-cuck path btw, not the other paths. Don't know if the author is afraid or what, a confrontation or a bit of tension doesn't mean you need to drastically change the direction of the story. People can have fights/disagreements without it ending in apocalypse. Being in their situation, going from a vanilla marriage to this, even if it was Ethan's idea and he likes most of it. Surely tension and drama would eventually ensue as Ethan's insecurites are rising in unison with his dick when he realizes he is losing control over his wife and thus their marriage too.
It wouldn't be hard for Nat to deal with any confrontation from Ethan at this point, she has so much ammo. She can deal with it gently and reassure him that it's ok for him to feel a bit insecure and give him a pity blowjob to calm him down. Or she can put him in his place and let him know that her desires are valid too. Would she make him get down on his knees and kiss her feet to apologize? Is that too far? Probably, we are not there just yet. But she already has Ethan's balls in her fist, she can easily put them under her heel if she really wants to. It's just tough love.