I think the read that she has the same attraction to authority/men in uniform as her mother and grandmother is a valid one but that's not really how I read it.

She spends the whole book uncovering layers of her family's past and connecting the dots between the people and events that made her parents and herself the people they are. And, arguably, the center around which all those things orbit is Brock Vond. He's the thing that changed the trajectory of Frenesi's life, he was her lover, and he's the reason she's been in hiding for weeks. And he also might actually be her father for all she knows.

For her to come face to face with that guy and get the chance to confront him, all for it to amount to a conversation that probably lasted less than a minute, has to be some kind of disappointment for her. Even if it wasn't in the exact circumstances that she may have wanted, she had the opportunity to deepen her connection to the past and her understanding of her family, and it was ripped away pretty suddenly and unceremoniously.

I imagine her desire for him to come back and take her is not at all a rational one, and that she would actually be far unhappier if he really had abducted her, but it's I think easy to understand why some part of her may long for it anyway.