That's all possible. But why let the situation play itself out when I can set events into motion as I see fit. I am no fool. I calculated what may happen and it worked precisely. Her "love" for him was shattered and she stoped fooling around with 20 year olds. It's very unlikely that someone would hate an entire gender because of that one event.
Why would Sarah do what I said? Because I broke her and presented her broken mind with what I wished her to believe. And of course she views me as a friend and an ally.
If you cannot control them by breaking their bones. Then break their mind. The mind can be trained to be stronger than what it is just like the body.