That was a fun read. Short and sweet, and ripe for more of Twilight's fantasies whenever they pop into your head.
This is a great short form story format, I do hope you return to it sometime, you've stuck a similar idea in my head now of Twilight sharing her kink with my favorite pony.

Well written and hot
I will be looking forward to reading more of Twilight's kinky, pregnancy-centered fantasies in the future

Can't wait to continue exploring Twilight's fantasies.

I like your idea, I hope this story isn’t dead.

I've been intending to comment on this for a while, because I find this a well-written story with a nice premise, and now I see it's not even finished; how nice, I think the setup for future chapters is obvious from the end of the first, but I'll see. I particularly like how Twilight Sparkle is a unicorn, which is how things should be, and am glad to see the synopsis reveals it will stay that way. There are some decent pregnancy stories involving Twilight Sparkle, but as an alicorn, which butchers her character beyond recognition in so many different ways.

The first large paragraph is an excellent setup and I enjoyed seeing another story similar to mine, in that it's rather dialogue-sparse, focussing instead on what the reader generally cares more about for such a story, the movements and physical interactions. I would've considered this to be a more typical kind of story, but I was pleasantly surprised by the chapter's end. The story is well-written; I noticed no flaws, although I wasn't looking for them; and the story maintains its verisimilitude through careful word choices and in so many other ways without which the verisimilitude is otherwise easily-shattered. While the story is mature, I wouldn't consider it extremely explicit, and that can be for the best; appropriately, it's best to let the imagination flow for such things.

Since it has been a few months, I figure you may be mulling over future chapters. I'd be glad to help, if my help would be wanted.