Fenris had been so caught up in fucking Sandie that he hadn't been prepared for her headbutt. It hit home on the top side of his muzzle, but still had much the desired effect. Fenris was now sprawled on his back with Sandie straddling him, his cock still balls deep in her tight little twat. Fenris shook his shaggy head and looked up at her with befuddled green eyes. One with a small flaw in the iris that was silver in color. He had known that Sandie was probably willing to indulge his sexual advances, but it was really the power struggle that got him going. He was, after all, a wolf. The hunt was what made the kill worth it. He gave her a wolfish grin as she continued to ride him. Fine then. He had won the initial battle. That was all that really mattered to him. They could fuck her way now, but he would still exert some measure of control. Fenris grabbed a hold of Sandie's hips and, still smirking at her, used her own momentum to birng her almost all the way off his cock, then drop her down with more force than she could manage on her own.