Rurik's confidence had grown with Kai to the point that he could take initiative with his lover. He knew Kai as well as he knew himself, and trusted Kai fully. He knew he was safe with the vampire, and that knowledge was important to him.
He shifted, and proceeded to undress Kai, avoiding direct contact with his cock until he was fully exposed. One hand wrapped around the base, holding him steady, and Rurik bent to lick from tip to base and back again before easing his lips down and around the length.