Philharmonic chapter 2 in progress

So I finally got around to writing the second chapter of Philharmonic. When/if it gets published you might noticed a bit more detail as well as the story moving a little bit slower. The second chapter was originally going to be just Vinyl and Octavia on their trip to Ponyville but I postponed it in favour of some fleshing out a bit of Octavia's character/ backstory. Also if you were paying attention to the summary you probably noticed Mister Motherfucking FancyPants is in that story (And he'll be playing a sizeable role) so my question is : What relation to Vinyl makes the most sense for him to have (I was thinking uncle, I just want to hear what you think)