Great stuff as always, good sir! You're one of the best when describing feet-based interactions on a raw, sensually intimate level. Perfectly descriptive! 

What you do great in all your writing, you did well here too. 

However, I do have a major critique of the story. The fact that Diane is Cody's gf's mom seemed rather incidental to the story. Neither Cody nor Diane ever once even acknowledged the fact that she's stealing him away from her daughter, or ask "but what will (gf) think?" (Just realized that gf is so much of an afterthought that she isn't even named.) 

The summary of this story on your page, with how you described the premise, made me hopeful, but I was ultimately disappointed by the contents. Diane may as well have been any attractive older woman with whom Cody's acquainted for any other reason. 

Personally, I think that incorporating this would have made the story that much more exciting. I personally love the mother-in-law fantasy within this fetish, and I'm sad that there's such a lack of it. The tension of being separated from the woman you love by her own mother keeping you all for herself is so tantalizing and should definitely be explored more. From your other stories, I know that this sort of taboo tension is definitely something that you could have narrated expertly. 

I sincerely hope that this critique doesn't offend you, as I have been a great admirer of your writing for years. I just think that with this particular story, the potential teased in the premise was not realized as I know you could have realized it. (I also fully acknowledge that the shortcomings I've described here could be because this story was a commission.) 

Keep up the great work! I always look forward to more from you! :) 

P.S. Please do consider more playful mother-in-law content in the future! ;) 

I could even commission you if you're interested.