Derpy's been out all day, delivering mail all across ponyville. Anon's been inside all day, valiantly defending Derpy during the /r/place wars, even if hooves are hard to type with. After they're done, both of them need to cool off...

Anon wasn't using that virginity of hers, right? Nah, she doesn't need it.

And it's not gay!

Chapter 1- Blowjobs, followed by Facefucking, in which Derpy manages to singlehandedly spitroast the horniest green mare in ponyville
Chapter 2- Mating press, then a good old fashioned mounting, Anon hopefully not getting pregnant