Remember, ladies, the key to a happy relationship is to repeatedly lie to your partner by pretending to be helpless, because his fragile masculine ego cannot handle anything less. Lie to him about your competence as often as necessary, just whenever he looks like he's feeling down: for example find a pickle jar and pretend you can't open it. And remember, guys, nothing makes a woman feel appreciated like knowing how great you think she looks as she's bound naked to an altar being savaged by tentacles.
There's nothing technically wrong with the story, but I wish the author had spent a little more time developing the couple as individual people who had their problems and particular fantasies for reasons- even if nothing else about them changes. Otherwise it feels to me like it's pointing to some kind of universal norm that's so far from my own experience it's hard to enjoy the story.