She knew what to do once he penetrated her. She let out a small moan as he tried to thrust into her, and then once he got the got the hang of it she got a little louder. Her research had said that moaning was a good stimulant for men. They liked making a woman feel good, and the only way to know that the woman felt good was to make her 'scream'. She wasn't sure if it was okay to scream however, so she settled for quiet moans to let her master know that it felt good to her, even though she couldn't feel at all.