Frilla is more resilient but that's about what he was expecting really. She wasn't going to be some virgin who had never had a good humping before in her life. Of course that didn't mean he was going to be so easily dissuaded. While he didn't let up even a little bit in his rough humping of his sister he realized he needed more for her than he had for Julia once she started taunting him. One hand moved low and, seconds later, Frilla would find that her clit was being teased now. He was going to make her cum and cum hard sooner or later.<br/><br/>"Is that so," he said "I wonder. If I'm scum what would that make my family. They don't take kindly to insults but if you'd like to berate them I'll pass the message on."<br/><br/>Yuuki could only smile between grunts as he enjoying watching her foxy body bounce with each thrust of his thick cock.