It wasn't any kind of an understatement to say that Alec liked being in control, liked being able to dominate Navi, be rough with her from time to time. It turned him on in ways that he hadn't experienced with anyone else. But on the other hand, having her on top of him, watching the way her body moved when she bounced up and down. It was more than hot in it's own way.
His own hips were moving up from the bed, trying to push his entire length into her each time she slid down, the muscles on his arms flexing when he gripped her hips. "For as long..as you can take it..Navi."