Mei is into it all and the more brutal the better. She knows that pleasure is meaningless without the pain to go with it. She does not just want to please Sister Dee. She wants Sister Dee to be able to revel in it all. Every time Mei recoils from the pain, every time she cries out for more or for mercy, it is all for Sister Dee to enjoy. There is no promise of rewards, just a chance to make her new mistress happy.