"I did not lie..." Na Na instinctively contradicted Tan Rou's words.
Zhuang Liu did not give her a chance to speak. He said to Tan Rou, "Why keep a maid who likes to be lazy and never tells the truth? We pay them to work, not to boss us around. Do we have to bear the consequences of their mistakes?"
Zhuang Liu was a man of principles. He could be gentle with his subordinates, but if they made principled errors, Zhuang Liu would never keep them.
Tan Rou didn't want things to escalate to this extent. The reason she gave Na Na a chance to explain was to leave some leeway. As long as Na Na was willing to admit her mistakes, Tan Rou wouldn't report the matter. But Na Na did not cherish the opportunity; she kept claiming her innocence and, even in admitting guilt, would shift the blame to others, showing a very poor attitude towards acknowledging her faults.