After being constantly left alone because of her husband's work, Derpy often has to play the role of a single mother. We get to see how Derpy's life unfolds as a mother of two kids and the wife of a Time Lord.
(Takes place after the events of season 5)
cover art: https://www.deviantart.com/dinkyuniverse/art/Loving-Mother-Derpy-Hooves-878975443