It really isn't. Controlling something is harder than breaking it. With the tech presented, it wouldn't be that harder to lock her in a simulation on an overclocked drive, having her experience a week of intensive sexual torture and directly zapping her nerves to produce the desired results.
Besides, it said the weak-minded, not even the average or slightly above. Let's see how a century long tentacle rape fares in turning her into a bowl of catatonic jelly.