An alicorn princess needs more than hay and cake, the dutiful guards and servant ponies knows this and willingly offers themselves to be a part of the princess. Tho some gets cold hooves at the last minute. Celestia demonstrates this to Twilight, while a guard offers himself up to be her first Alicorn meal.
 
This drawing was sitting unfinished since 2015, I finally got to finish this!
 
Also, this is my final illustration. Im retiring from drawing vore as of today :) . More info in this journal: https://aryion.com/forum/blog/PonyThroat/index_b-44616.html