Is she my sister or what?

Old Master Situ's face burned with anger as he picked up his most precious inkpen which was resting on the table and then glared at his son who was sitting in front of him, Situ Xun did not dodge and allowed the tip of the pen to scratch his cheek.

"How dare you! Did I not say that you are not allowed to touch that girl? I forbid you ..do not taint her!"

The smile on Situ Xun's lips turned mocking as he tilted his head and then asked, " Why? Do you plan to taint her by your own hands, Father?" 

Almost immediately, Old Master Situ's face turned red in anger, he looked at his son with a glare as if he was seriously contemplating whether or not to hurt him physically but then he restrained himself and then said with a calming breath, " I am telling you to stay away from the maid for your own good. You don't know who——" he stopped himself and with great effort said, "You just stay away from her."