Why did Lee Mok Sau teach martial arts skills to Luk Mo Seung? Although in a moment of nostalgia for Luk Tzin Yeun, Lee Mok Sau agreed not to kill little Luk Mo Seung and even nominally took her in as a "student", Lee Mok Sau never considered Luk Mo Seung as anything more than a personal slave and punching bag for venting her frustrations. It didn't seem to make sense that Lee Mok Sau would teach Luk Mo Seung any martial arts.