This was a new position for Sam and Luke, and it took them a moment to find a rhythm. But soon they were in sync, Luke's erection pushing in and out o... Sam's wetness. Sam's muscles grasping and ungrasping his huge penis. Their pelvises were mashed together in this position, resulting in lots of pushing and pulling and rubbing of Sam's clitoris, which was driving her wild. Opening her eyes, Sam realized she could watch the proceedings on the mirror behind Luke. And what a sight it was, seeing. “Oh, yes!” Siobhan whimpered back, her hand seeking Harriet’s body now, running up and down her back. “Shall I touch you, too?”“I should love that, Siobhan,” Harriet answered with a hint of a chuckle. “Your boob feels nice under my hand.”“My what?” Siobhan giggled.“Your booby, your breast,” Harriet chuckled. “It’s so full and proud! I envy you.”By now, Siobhan’s exploring hand had found Harriet’s breasts. They were fuller, after Richard’s birth, but they were still firm and pointy, and. .. God, I don’t think I can move...”“You’re okay?”My sister nodded carefully. “Yeah. God, Adam, I feel so full. It’s ... it’s everything I ever wanted. Just give me...” She laid her head against her hands on the sofa. “Give me ... just a moment.” Vi blew out a long puff of air and sucked in a deep breath. Did it again. A third time. I watched her steel herself, fingers biting into the sofa. “Okay ... slow, please...”I tried pulling back. Violet raised her head again, a deep moan escaping her. Now, as she sipped her coffee and nibbled a light sandwich, she was filled with a terrible, burning shame. The terrible things she had been doing with that irresistible animal -- and then to get all excited up between her thighs when she heard her own parents doing it -- what was she coming to, anyway? She had always been brought up so refined, but now her animal instincts seemed to be taking over at the slightest terrible temptation.What had ever driven her to that disgusting, loathsome act.