Psychic (The Knight Sisters #1) [gxg] {Stepsisters}

Maxima Knight's genetically engineered and she doesn't like it one bit. She's a Psychic and can read minds, tell the future and all that stuff. But that also means that the Scientists that created her and her misfits of a family are hot on their tail.
At the age of nineteen, she suddenly notices a queer thing. No one has been attacking her family for the past month. She wonders if they had found another Genner but quickly dismisses the idea. She and her siblings live a slightly less hectic life for he next week until her mother announces that her fiancé is moving in with them. Apparently, said fiancé also has a daughter Maxima's age.
Aislin Kade is not happy with her father's decision of moving in with his fiancée. She had finally just fitted in her new neighborhood and made friends she actually liked. And now she would have to live with a bunch of snobby rich kids. Except Aislin doesn't know that those kids are hiding a secret that could cost them their lives.
And they don't know Aislin's secret, either.
Nobody does.