Scott got reincarnated in the body of Klaus Mikealson right at the beginning of the first episode of the originals series. He always wanted a kid but was infertile so it resulted in a divorce in his past life so when he got the opportunity to have a kid he didn't pull any punch on all the enemies that want to take her away from him. But on another unrelated note, Tribrid huh? Niklaus MIkealson x ??? x Caroline