https://www.deviantart.com/decora-chan created this piece.
The story is found here: https://www.fimfiction.net/story/406700/journey-to-hearths-warming
The scene found here: https://www.fimfiction.net/story/406700/34/journey-to-hearths-warming/season-4-prologue-the-darkest-light
Side note, the tag 'Implied Selfcest' is here pure because for the most part this scene involves two characters that while seperate beings, currently share the same body, that's the whole point of the previous post of these two found here; https://derpibooru.org/images/2676363
This is due to the fact that Hollow Prince currently lacks an actaul body of his own. This is also why I can't give him a species tag. Blood Diamond is basically an alicorn, but I can't go into more detail then that without spoilers. If the mods find the tag pointless then I won't argue with it's removal.