In Mystic Falls, Miranda and Grayson Gilbert were a happily married couple with five sons: Jeremy, Jordan, Josiah, Jason, and Julian. Miranda wanted another child, but was unable to get pregnant. One night, a mysterious pregnant teenager appeared at their door, seeking help. She gave birth to four baby girls, but sadly died due to childbirth complications. Miranda and Grayson adopted the girls, naming them Marianela, Ariana, Lucy, and Emilia Rosalie, with Camille Aimee being fraternal twins.
That's when the original brothers arrived in town, along with Stefan and Damon Salvatore, the latter of whom was a vampire, as well as their cousins Elijah, Klaus, Kol, and Rebekah Mikaelson, forever changing the lives of Elena, Lucy, and Emilia.
When Elena's brother Jeremy was born and arrived home from the hospital Elena's parents were shocked to see Jenna holding a baby girl. Jenna explained how the baby was left on the doorstep with a letter saying she needed protection and her biological parents couldn't keep her safe. From that day Grayson and Miranda Gilbert adopted the baby girl and said that Aria is Jeremy's twin sister.
This is a crossover between The Vampire Diaries & Teen wolf.