Break her psychologically for what? It makes no sense. <modsnip>
Keeping someone for 3 weeks is hugely expensive. I'm not just talking about the cost to feed them. I'm talking about having to guard them, take precautions they are not located, communication with various people throughout to avoid detection. It takes a lot of time that could be spent somewhere else ("opportunity costs"). And of course the risk you would be caught and spend much more money/time defending yourself, going to prison for years, etc. Why? What is the payoff?
Gangs do not typically sex traffic 34 year old blonde American women with a family and involved in the community. Please. They go after much younger, vulnerable girls who can disappear with few people knowing or caring. And they certainly don't hold them for 3 weeks and simply torture them, only to let them go. That's 3 weeks of zero income, high risk.
Gang initiation? OK, maybe, but 3 weeks?!? I can see some crazy initiation where they must kidnap and brutalize a woman, but not for 3 weeks!
Revenge on the family runs into the same issues. You can "send a message" in 3 days, you don't need 3 weeks. Too risky, makes no sense.
You're right. None of it makes any sense to a rational mind. That's why we're on thread #15. So, what do you think happened here? Motive?