I bet you're thinking how in Equestria these three are sister-in-law's. Let's just say they have brothers who got married with who.
Cadence X Shining Armor
- Flurry Heart (Female, 1st Born, Alicorn)
- Crystal Shield (Male, 2nd Born, Pegasus + Part Alicorn)
Mr. Cake X Mrs. Cake
- Pound Cake (Male, Twin, Pegasus)
- Pumpkin Cake (Female, Twin, Unicorn)
??? X ???
- Cozy Glow (Female, Only Child, Pegasus)
(All of The MLP Kids are my OC's, don't claim to be yours without my permission! Except for the ones you see in the show)