Thank you for the positive feedback and I'm glad you enjoyed it. I'm quite surprised that a lot of readers on that site liked it too. At first, I thought the story would be rejected for being too extreme, even though I edited out some of the kinkiest parts concerning pussy-denial fetish for fear it would be seen as advocating mysogyny or something. It took a few days for the story to be approved before finally getting published, so I was loosing hope.
Regarding the female protag's body shape, my aim was to move away from the overused trope of the slim, forever-21-or-less girl and direct the reader's eye to the more mature feminine form. At one point, I even wanted to make it clear that the male protag might be a good few years younger than Amy, and still much more experienced sexually, but decided to leave that to the reader's imagination. Similarly, it's up to the reader to decide how they want to see her body, either as supercurvy, or simply a bit plumpier than her own self twenty years earlier. However, the other woman support character is a sporty type. I'm thinking an ex-Soviet olympic gymnast (hence her Russian name), who still goes to gym regularly.
Not sure if I have it in me to write a sequel though. Sure, there are plenty of sweetly sick ideas on where Amy's AO journey might go, but I'm currently working on a much safer for work narrative this long scene is supposed to be just a tiny part of--a wet dream the protagonist has had and then continued to daydream about. But if the story gains in popularity, then I might reconsider my literary plans. Also, wouldn't oppose an idea of gamifying the story, with Amy as a willing subject of ass-only training regime, with strong flavors of pussy-denial, orgasm control, chastity play and BDSM. All consensual and as realistic as possible, so no goblin assrapes of magical girls, or buttstuffing slavegirl-asstronauts kept at a secret lab on Mars.
I've had a browse of your collection of favorite stories on Literotica and while some of them can be quite 'dry' and matter-of-factly when it comes to anal fetish (or anal-only to be precise), there are a few that should become a source of inspiration to a few AO games.