Riley let out a howl of pleasure as he felt Tao filling him up. He arched his head back up and nipped at the vampire's skin, taking hold of his lower lip with his teeth as he came just a few seconds later. His nails pressed into the vampire's skin and there was nothing he wanted more than to mark him for his own. He growled again, nipping across Tao's skin with impatient, animalistic whines that emitted from the back of his throat.