How does Safie end up at the courage?

I assume you mean how does she end up at the cottage? Although Safie is separated from Felix and Agatha after their trial, she has gained a certain independence taught to her by her mother. The Turk (as he is called) wants to take her back to Turkey to a life of submission and subservience; she escapes, brings with her some money and finds Felix and Agatha in Germany.