The fourth story in The Journey of Graves.
After their little trolling adventure, Sweetie Belle has decided that Graves would make a great big brother. Of course adoption's out of the question (after all, parents always say no), so that just means the Cutie Mark Crusaders will have to get creative.
Meanwhile, Rarity has taken an interest in Graves for completely different reasons. Just what does the prettiest girl in Ponyville see in the gruff, stern faced soldier? He has no idea and frankly, isn't sure he wants to find out.