There are plenty of punishments that aren't physically strenuous, such as privilege removal, humiliation, and frustration (both sexual and not). Of course orgasm denial is high on the list, but there's also removal of something the sub likes (my little one's XBOX is quite precious to him and most times all I have to do is look at it menacingly and he'll be good out of fear it will be taken away). I'm not a humiliation expert but there are plenty of people who could suggest things for that.

For frustration I once told my little one he had to text me every time he touched his cock, whether to scratch, piss, or wash, for an entire day (that was a LOT of texts and he was very good after that, or else I might have extended that for more days).

One night he told me he was too tired to make dinner, so I made dinner for a week and it was salmon every night (he hates seafood) for him (while I got a variety of meals he enjoys and could not have). I made him eat every bite. He's never complained about making dinner since. Oh, and I also made him pay for the salmon since that was expensive!

I really liked your essay idea, and you could expand on that to include not just what she did wrong but why she did it. Sometimes you get an answer that surprises you, and it turns out there's a deeper issue that needs to be resolved. If she is consistently being disobedient it might serve both of you well to get at the underlying issue as to why that is.

I applaud you for your endeavors with such a challenge. Just keep up the creativity and you will find things that work over time, and hopefully bring happiness to both of you!

And I should have asked this sooner, but do you live together?