Ilinca is fairly straightforward, she's the consumate black widow and feels zero remorse for being that way. She finds rich men, marries them for a few years, then drains them of their life force and takes their money when she gets bored. She makes sure to cover her tracks and move around a lot to avoid getting caught, and has thus amassed quite a bit of money and property over the centuries. It's very possible, though, that she slipped up when she was younger and drew some attention, thus leading to her being hunted across the years, on down to your guy.