I dropped onto all fours, eagerly licking at her soaking slit. She whimpered and moaned as my tongue, long and large enveloped her nether regions. I growled hungrily and lustily, licking it as she pressed it harder against my muzzle, splaying her labia wider, allowing my muzzle to penetrate her. She grabbed the scruff of my neck as she neared another orgasm, pulling my lupine snout further in, and my tongue roughly licked the inside of her, revelling in the scent and flavor of my previously forbidden quarry.
She gasped and shuddered, loosing more fluid into my mouth. "Oh...oh..GOD...J..Joey," she moaned, gasping for breath, "Bite me...fuck...fuck...J-Joe...Joeyyy...bite....myclit!" She pulled away from me slightly, presenting her swollen clit to my fangs. With a low growl, I did as she wished, hell, I did as I wished, and had been wishing, biting hard into it. Her blood rushed into my mouth, along with a new flood of orgasmic juices. Her mouth opened into an "O", but no sound came out. She shuddered and trembled, and collapsed onto her back, trembling, shuddering, a look of ecstacy upon her face, her cum puddling beneath her quivering slit.
I felt my changes beginning to revert, and I didn't fight them. I'd gotten my wish-I'd found a companion and made them a werewolf. I felt my body shrinking, and I collapsed onto the floor, feeling weaker now.
In a couple of minutes, I was back to my more mundane human form, albeit naked. Kim still trembled, and I picked her up in my arms, carrying her to my bedroom, covering her up. Though part of me still thought of her as my sister, the rest of me already was thinking of her as more than that.
"I wish your lycanthropy was the same as mine," I said, rubbing the ring absentmindedly as I stared at her unconscious form. I saw her gasp in her sleep, as though she could feel the magic that I'd used on her, and wondered if indeed, that she felt it. It was just a passing thought, though.
I went back out to the living room to watch some television, wanting to let her sleep, to let the infection work its way into her system. I was sure she'd wake up soon enough, and I looked forward to it.