Here is Apple Bloom with her sister-in-law, Limestone Pie! The two didn’t start off well at first, however, overtime, they warmed up to each other. And now, Limestone acts like a protection big sister to the little filly.
Headcanon: Applejack and Pinkie are NOT cousins, Big Mac is married to Marble Pie and the events of Season 8-9 are not canon.