This is incredible. I read the first 11 chapters yesterday and chapter 12 today, oh boy 20,000 was a lot but a good read. You have a full length novel here man. 

This has been a crazy ride. You've been knocking it out of the park. I don't even know which parts to talk about. Mimi has been such an interesting character. Watching her relationship with Roy has been so entertaining, the two are able to quip at each other so easily. And how she denies his taste. No wonder Sarah teases her so much about the two of them. 

I wasn't as big of a fan of Sarah at first because she seemed like more of an obstacle than a character, but Chapter 11 was HOT. Her playing with him between her boobs was so good; that method of showering a tiny is definitely one I'd love to revisit myself. And seeing how she was careful with him during the shower was satisfying. 

(Before continuing, I'd like to say that your story gave me some inspiration and motivation for my own writing. I'm working on a couple of stories myself, one I'm posting as I finish each chapter which doesn't really have a concrete plot-arc(it's definitely more on the erotica side and just continuous character interactions; if interested: https://giantessworld.net/viewstory.php?sid=11291) and another which has a plot and character arcs that I won't post until I've finished). 

Quality over quantity(although you have given both) so don't feel bad if it's not coming as quickly as you'd like. 

I am very curious that Roy didn't even talk about Punishment #2. What would the consequences of that be and how did he not want to jump at that opportunity? He really cares about those two doesn't he. 

You are the author but my own preference for every story is to be non-fatal. I never have really understood the fatal part of the fetish, in my mind it just stops all the fun with the death while non-fatal keeps the fun going forever. So usually I like the tiny to be indestructible, although not necessarily invulnerable(pain can be fun) because it allows for more opportunities. I really hope that he doesn't die from it. I know that's a very likely direction for the story that would be bittersweet, but poignant, but I really hope Roy lives. Who knows what the wish will be. (I really hope it's for him to be tiny and not die of anything but old age so the fun continues).

So far it's been amazing and I think you'll continue to astound.