Twilight Sparkle and Applejack both say they have the best Big Brother in all of Equestria. Big Mac, being a witness to this little spat, tries his hardest to calm the two young mares down. But all that went out the window when Shining Armor arrived. What will happen when Shining Armor and Big Mac switches sisters for the entire day?

Author Note:
Just so you guys are aware, I have read B.B.B.F.F.B.R. all the way through. It might not look like it now as I am still working on it, but it will be a different story from it. One big difference, Twilight has her castle in my story. I won't give any more details away. So bear with me. Thanks. - Musica