Family? Brothers Conflict fanfic (reader x Kaname)

Jacqueline, a mysterious past. A mysterious person. Has a secret that no one but her adoptive family knows. A little sister named Ema and a Pet dog named Zena. She also has two children, twins, a girl named Kassandra and a boy named Tamaki. Who's the father? What is this mysterious past? What will happen in this story like no other?