Well, if she was just hired and didn't have any personal agenda, then she has totally no reason to repeat it in this life.
It's *just* that she surely is troubled that people she killed on someone's order may not like it and want to pay back in this life.
And that's probably why she doesn't want to be involved with anyone who can't think on their own, she needs someone neutral, who could listen to her calmly and see her as her current self, not through the past.
Probably.