While Anna uses Andreas' phone, he listens in on her conversation and later, when she has gone but left her handbag behind, Andreas searches it and reads a letter that will later prove she is deceptive.
Anna uses Andreas' phone. He listens in on her conversation. Andreas searches it. This is later. Andreas reads a letter. This is later. This letter will later prove. She is deceptive. She has gone. She left her handbag behind.