"Sure," I said, getting an excited giggle from Kim, along with a kiss.
"You're the best!" she said, planting another wet one on me, "I'm gonna give her a call and invite her over."
Kim grabbed the cordless, dialing Cheryl and pacing nervously as the phone rang. "Cheryl?" she said as her friend apparently picked up, "Hey, whatcha doin'?...Well, why don't you come over to my brother's apartment. We're just gonna be here drinking and watching movies all night, and I was thinking how much fun it would be to have my favorite film student hanging out. ...You will? Great, let me give you directions!" She excitedly gave her friend the directions, ending the call with, "Great, see you in an hour!"
"We'd probably better get some clothes on," I said, "Unless you've neglected to tell me that Cheryl is a nudist."
Kim laughed, "I think she'd be okay with me hanging out nude, but you...she'd probably want to get to know a bit better."
"So, is she bi, or is she strictly a lesbian?" I asked, "I just want to know if I'm watching or participating in the fun."
"Oh, she's bisexual, don't worry. We'll both be having our share of fun with her," Kim said.
"Umm, Kim," I said, realizing I hadn't asked a pretty important question, "Is she going to be into being a werewolf? I don't want to really fuck up her life, ya know?"
"She'll love it, trust me," Kim said, "She wants to make horror movies for a living, or failing that, horror porn."
"Seriously?" I asked, not having really ever thought about "horror porn".
"Yeah," Kim said, "She's a total nympho."
"And you're not?" I asked with a smirk, smacking her on the ass.
Kim blushed, "I haven't heard a complaint out of you in regards to my sex drive." She wandered into my bedroom, digging through my dresser for something that might fit her. After a few minutes, she found a pair of loose-fitting shorts and a tank top. I could see she hadn't bothered putting on a bra, and I assumed that she'd similarly eschewed panties.
"That's a good look for you," I said, cupping a breast as I kissed her again, still somewhat in shock that she was MINE. The concept of her being my sister, and this being wrong at all had totally faded.
Her nipples stood straight up, and her eyes faded to amber. "Joey," she said, "We really need to stay calm, at least for awhile." She walked away from me, still managing to give me a come hither look, smiling at me with fangs poking over her lips. "There'll be plenty of time for that later." She disappeared into the bathroom, and a few minutes later emerged, and to the naked eye was entirely human.
I slipped into a tshirt and jeans, then hurredly cleaned up the apartment, joined by Kim once she'd managed to control her animal side. Between the two of us, we managed to do a pretty good job, especially since every time she bent over, I found myself staring at her ass, and on one occasion her face had been very near my crotch, leading to ME having to excuse myself to the bathroom to control MY animal side. Part of me wondered if this evening would be truly consensual, or if it would really be more like Cheryl getting raped by two horny werewolves the moment she walked in the door.
Roughly an hour later, there was a knock. "Oh," Kim said, "That must be Cheryl. I'll get it."