He contemplated banging his fist on the table and going into a rage at the mention of their sister, but thought the better of it. He had already drugged the milk, after all; all it was going to take now was for it to take effect. He simply looked up and shot a venomous glare at his twin. "Never mention her. Ever again." His thoughts warped, he waited in silent, maniacal glee for the drug's effect to show itself. The drug he placed into the milk made it so that her body grew numb and weak, and her vision would become hazy. It was something similar to a 'high' drug, giving her random, painful hallucinations and horrifying thoughts. In short, it was a catalyst to terror and abuse.