Is this more like seeking revenge or can she seek justice long after the fact if it is still negatively affecting her? If magic is used so long after, will it harm her in stead?
Is it possible? Sure, at least in the way that I view time - more as a spiral than as a linear stream... perhaps as a spiral current that ebbs and flows in a great ocean of events... but that's for another thread...
It *is* possible but consider everything that has happened after that event that the event itself had an impact on, both physically as well as mentally/emotionally. It gets immense quickly. I think the more elegant solution would be to perform a working that would release her tie to this event and allow her to move on with her life with whatever lesson she can gain from the experience.
Showing her how to protect herself, bringing a measure of control and self worth back, would also be quite helpful.