I dry hump her as I move my hands up from her sides onto her boobs and press them and let my lips kiss her neck again. She starts grinding my cock whi...h starts getting hard and all we can hear now is her heavy breaths with moans and me sighing on her neck as she moves her ass faster.I pushed her down to the bed and started biting her nipples hard and sometimes licking her armpits.Which let out nothing else except the sweat smell by this time she was totally under me and couldn’t move an inch. We maintain ultra clean room conditions." The professor sounded like a proud tour guide. "You may, however, look through the viewing windows." Somehow, as he spoke to us here on his turf he looked more like a keen scientist than a mad professor."This is all a part of a prehistoric mine complex that opens up into a series of natural caverns. There are cave paintings in some of them that are quite fascinating. We haven't had time to explore the rest of this complex. Our research comes. Becky adjusted her stance instantly, kicking up tiny clouds of sand as she set her feet. I stared in awe as Becky’s body hardened, a tremor of muscular power running from her calves up to her abs, as one by one the gigantic muscles of her tiny body contracted, popping into definition. From her slim ankles up to her young cherubic face, she was pure muscle. Every inch of her chiseled to perfection. My nipples were so hard that they hurt.But as hot her muscularity made me, her strength moved me. Moaning, knowing that at this moment in time, I can take you any way I want to. Knowing I have this power over your body if I want it. I know you want it hard. Knowing you like it hard. I can’t hold back anymore, and I let myself do something I’ve only dreamt of doing before, raising my hand, letting it fly. For the first time, I spank you. Quickly I plant a kiss right where I spanked you and that sigh… Oh my god!! That sigh drives me so wild! My body driving my mind, my mind no longer in.