Yes, there are some key pieces there that have not shown up in the story...yet.
Perhaps King B never intends to show the positive aspect of Ethan being the only love for Natalie and completely capable of satisfying her. That they, as a couple, engage in extramarital sex for the sexual satisfaction of the couple. And after Natalie has crazy sex, that Ethan is present for or permits to happen, he is there to love her and reclaim her and her adoration for him grows.
That is certainly not the story we have seen so far. Pieces are beginning to come into focus. I continue to believe this is a result of the nature of viewing a story as it is being developed and the way it is released with inherent limitations. We do have a scene where Nathan enjoys Nat with Darrel. The scene is more realistic and clearer if the player chooses not to allow Darrel to cum in Nat. But then, you lose several scenes as a result. Again, this calls into question the intended story. It seems focused on the cheating path (or the forced cuckold). It has the most content and fluid story. On that path, Ethan is jealous and unsupportive, obviously. The hotwife path has support from Ethan but he is neglected by Natalie and still humiliated. Or he is involved but this path is limited and poorly developed.
If I were in Ethan's shoes and Natalie acted the way she does, I would take her on the most romantic date to a beautiful make-out point overlooking the city. As we gaze at the moon and lovely city below, I would push her off the cliff and gleefully watch her fall to her death. So, I do not fault Ethan for being jealous or angry. If we were in this together, and Natalie had sex with others for my enjoyment, then the expectations of how she would behave and what we would do before and after would be clear to both of us. And if she strayed too far from those expectations that we had both agreed upon, then I would still be taking her to that overlook! Granted, I am not into cuckold play at all. So, there's that.
Still, I am asking myself, where is the crazy sex she is supposed to be having with her husband after they get done with the other guy? Where's the win-win?