"Yes, do it for Krissy," He mocked.
He certainly did enjoy getting serviced by his sisters, but it was the humiliation that turned him on more, rather than the feeling of their tongues on his manhood. "Good job girls -- I knew you two would know your way around a cock." He smiled, evilly, still pointing the gun down at them. "If it's any encouragement, imagine your little sister's petite body naked on a mattress, crying as I lay on top of her, pounding her innocent little pussy. That's what's going to happen if you don't make me cum. Maybe I'll even keep her, actually -- she'll get used to being fucked by her big brother."
He waved the gun at them. "That reminds me," He said, "If I do fuck her and find out she isn't a virgin, I'll kill both of you instead." He didn't really care if she was a virgin -- though he was disgusted by the thought of those two taking her out to get fucked by guys -- he just wanted to scare them, and encourage them to do a better job on him.