Mistress Kira felt that her slave needed to be given a wake up call. So anytime he messed up, she had to find a way to deal with him and the best way she chose to deal with him was to make him lick her smelly socks. The mistress told him she would only stop when he did not piss her off and he did his best not to piss her off as it was humiliating being made to lick and to smell her socks.