Celestia turns into Daybreaker whenever she is incredibly upset, and it is the job of a guard called Quill Cutter to try and calm her down so she turns back into Celestia. To do this, he starts by making her breakfast, using her body to cook various foods to try and distract her from her problems. The job doesn't seem all that bad until she instructs him on how she plans to cook the popcorn.
Contains: Food being cooked on the back of an alicorn, mental trauma, popcorn being cooked inside the vagina of an alicorn (story spoiler).

Coffee link if you want to support me: https://ko-fi.com/hatterthehorse
(Done as part of my 10 year anniversary transformation drive! https://www.fimfiction.net/blog/1046556/10-year-anniversary-transformation-drive)