The first generation version of her and jeremy had no love between them, it was a means to a end for both of them, she had her father's (i believe it was his) ruthless teachings drilled into her so deeply that she saw others as methods to her own survival over actual people, the second timeline version of her however get's to actually fall in love and learn something different to her father's teachings, becoming a entirely different and better person in the second timeline, and is engaged to elias (think that's his name, the redheaded brother), not jeremy, in a mutually happy relationship, remember the moral of this story is redemption and if you could change the past, how would you and what it would effect, tl;dr is the second timeline version of her is a really good person, the first timeline version was a person who was more or less driven insane by an entirely different path, so in many ways, shuli saves everyone in the second timeline, not just the children, but even many who disliked her.