Title: Of Keys, Slayers, and Cruel Intentions

Author: Gabby

Summary: Instead of the monks making Dawn the key, Kathryn Merteuil is created to be Buffy's twin sister. And what happens when the handsome Sebastian Valmont is thrown into the mix? Spoilers for seasons 1-5 and Cruel Intentions.

Rating: R

Disclaimer: Not mine. All Buffy is owned by Joss Whedon. And Cruel Intentions is owned by…some other brilliant person who's name I don't know off the top of my head.

Author's Note: My first Cruel Intentions story, but definitely not first Buffy, first crossover, or first fanfic! I'll update as often as possible, if I don't it's because school or something interferes, I have the whole plot and story line down… it's just typing it and getting it posted. Feel free to leave comments and constructive criticism, but please no flames. Enjoy!

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Riley looked out of the helicopter, no sign of Buffy. He scanned the streets, no lone figure racing toward him. He shouldn't have expected it, not after what he did. Buffy didn't love him anymore, even after the letter. It was foolish to think a letter could get her back. Even if what he wrote was entirely true. He closed the door and sat back in his chair, wondering if he'd ever see the girl of his dreams again.

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Kathryn smiled as she threw the letter into the fireplace. To an outsider it might seem as if she was helping Sebastian, but she wasn't. Without this letter Buffy would have no form of closure and it'll be harder for her to trust again. She watched as the flames licked the sides and as the white paper turned into black ashes. The only recognizable thing left was Buffy's name scrawled in the middle of the letter, until a hold burned right through the middle of it.

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"Where's Kathryn?" Buffy questioned, coming down the stairs.

"I think she went out. To The Bronze or something," Sebastian replied.

Crap, Buffy thought to herself, She won't be able to defend herself… and considering she looks like me…

"Y'know… I think I'm gonna go out too," Buffy paused and looked at Sebastian, "Wanna come?"

Sebastian grinned to himself, "Sure. I'd love to."

They left the house and headed down toward the abandoned warehouse which was turned into The Bronze, pretty much the only cool place to hang out in Sunnydale. Aside from the Espresso Pump and of course… the graveyards. When they reached the club there was music pulsating from the inside. Tonight it was a DJ, no band. The end of Diamond Dogs by Beck was playing as they entered. It then switched to Beat City by The Flowerpot Men. Buffy moved with the music as she made her way through the crowd, searching for her sister.

Sebastian smiled as he watched Buffy in front of him. She seemed happier than she had been lately. And she seemed intent on something. He decided to act now. He grabbed Buffy's arm and pulled her back. She spun around and smacked into him. She laughed lightly and blushed, "Oops."

"Wanna dance?" Sebastian asked, grabbing on to her hand.

Buffy's spine tingled, "Um… sure. Let me put my coat down."

Buffy walked over to an open table and slung her jean jacket over a chair. She walked back to Sebastian and they headed out onto the dance floor. The song changed again, this time a fast, techno beat. They moved with the music, Sebastian's arms wrapped around her waist, and soon lost track of everything around them. Buffy didn't even notice as Kathryn left the club with a certain blonde vampire.

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Kathryn opened up her mouth to speak, but before she could say anything Spike had her up against the wall. It took her a minute to register what had just happened. Once she regained a sense of what was going on she started kissing him back. It was an intense kiss that didn't seem to be stopping anytime soon. Kathryn dropped her Dolce & Gabbana purse on the ground and wrapped her arms around Spike's neck. They stayed that way for awhile, as amused couples came and went. Spike finally pulled away. Kathryn caught her breath and fixed up her hair. Spike bent down, picked up Kathryn's purse and handed it to her.

"Goodnight, love," he said and disappeared into the darkness.

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Gunn walked down Sunnydale's main street. He saw couples holding hands and smiling. He saw families carrying shopping bags and talking. Then he looked for the things normal people don't see. The sulking figures in alleyways. The look of fear -- or the look of hunger -- on someone's face. As he walked past a dark alleyway he heard some scuffling. He doubled back and walked into it.

At the end Gunn saw a vampire and a petite blonde with her hair up in a ponytail. The vampire was advancing on her, but the girl didn't seem afraid. She actually seemed… excited? The vampire lunged at her and before it could do anything she roundhouse kicked it to the head. Gunn was in awe as he watched the girl fight the vampire.

The vampire threw punches, the girl blocked them and vice versa. The girl head butted the vamp and then quickly did a back flip, her feet kicking the vampire under the chin. The vampire flew backwards and slammed against the brick wall. The girl called out, "Honey! I'm home!" and threw her stake across the alley. It jammed into his chest and then fell to the ground as the vampire turned into a pile of dust.

The girl walked over and picked the stake up off of the ground. She pocketed it in her coat and turned toward the mouth of the alley.

"Shit," she stated out loud, seeing Gunn. "Look buddy… don't, y'know, say anything about this? I mean I'm sure enough people know already, but the last thing… "

Gunn cut her off, "You're the Slayer?"

The girl's eyes bugged, "Um… yeah. How'd you know?"

"Well… I've been fighting vampires and demons for awhile, y'know?"

"Sure… "

"And I always heard 'bout this girl that fought for our side. Killin' things and what not. Never thought she was real. And… look at you."

"Excuse me?"

"No offense… you just don't look like you could… do a lot of damage."

The girl smiled, walked over and punched him in the stomach, "My name's Buffy, what's yours?"

"Gunn," he croaked out.

"Pleasure. What're you doing here anyways? I haven't seen you around before."

"I'm not at the liberty to discuss that. 'Sides, why the hell should I answer you? You just punched me in the stomach."

"Oh, I'll find out. See you around," Buffy chirped and walked out of the alleyway.

"Ugh," Gunn slid down the wall, "That's gonna leave a mark."

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"So he could totally be related to our glow light?" Buffy asked, tossing the orb up in the air and catching it.

Giles gasped and leaned forward a bit, "Could you not? What if it breaks? We could all be thrown into another dimension."

Buffy pouted but held the orb still, "Fine."

Giles looked towards Willow, "Have you found anything on this orb?"

Willow shook her head, red hair up in a ponytail, "Nope, still looking though."

"So this man could potentially have something to do with this orb."

Willow nodded and started thumbing through another book.

Suddenly Xander ran into the room, "Quick! Turn on the television!"

The three that were currently there looked startled, but pressed the power button. On the news were at least ten people being admitted into the psych ward at the Sunnydale hospital. Buffy squinted and recognized one of them as the security guard from down by the docks.

"Hey!" she pointed at the man, "He's the guard that I saw when I found the orb!"

"Maybe he knew more than he was letting on?" Willow ventured.

"We should talk to him!" Xander voiced.

"Look at the state his mind is in, Xander," Giles stated, "I highly doubt we could get anything out of him."

"Well it's always worth a shot, Giles," Buffy said. "I'll see if I can get into the psych ward when I drop mom off at the hospital tomorrow."

"Hospital?" the other three asked, worriedly.

"Don't worry guys; it's just a routine checkup."

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Buffy made her way down the hallway in the psych ward. She was surprised the nurse had readily believed she was a family member of the security guard. Luckily she remembered the name she had read off of the name tag. She found the right door and made her way down the row. She finally found the man she recognized as the security guard and knelt down next to his bed.

"Hey, remember me?" Buffy asked soothingly.

"So bright, so bright," the man muttered.

"The orb that we found? Yeah… sure. Do you know what it happened to be used for?"

"So bright," was all the man could utter.

"What's so bright?"

"The key," the man on the other side of her practically bellowed.

She turned and looked at him. He had what Buffy would like to call "monk hair". She whispered to him, "The key is bright?"

"The key. Radiant."

"And… what is this key?"

"Protect," the man then looked at her and didn't blink once, "You must protect."

"Protect what?"

"The key. Slayer will protect."

Buffy gasped, "You know who I am?"

Then the man went into a fit and the security guard just kept mumbling "So bright". Buffy quickly left the room and saw a nurse walking by. She stopped him and quickly looked at his name tag, Ben. "A man in there is a having some sort of fit."

Ben's eyes widened and he ran to the room. Within seconds an alarm was sounding. Buffy figured she should get out of here before anything else went wrong.

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Buffy was lying on her bed, thinking about the night at The Bronze, when Kathryn came in.

"A lot on your mind?" Kathryn asked, barely caring.

"It's Sebastian," Buffy replied.

Kathryn cursed quietly to herself, He better not be getting to her already.

"What about him?"

"Well he doesn't really seem to be the way you described him."

"Oh, my dear sister. Let me share with you a few of Sebastian's exploits."

Kathryn then explained, in great detail, what Sebastian had done to the psychiatrist's daughter and to Cecile. When she was done she settled back onto her cot. She smiled perkily up at Buffy, "Any questions?"

"N-n-not really," Buffy managed.

She couldn't believe Sebastian was capable of that. Spike was capable of that, oh yes he was, but not Sebastian. Buffy must have muttered Spike's name because Kathryn had just quickly looked up at her and asked, "What about Spike?"

"Nothing. I was just… thinking," Buffy replied.

Kathryn narrowed her eyes; She has another thing coming if she thinks she can get Spike. Besides, he's got me. What more can he want?

"Why do you ask, Kathryn?" Buffy wondered, suspiciously.

"No reason," Kathryn replied smoothly, "I'm going to go finish getting ready for bed."

Kathryn smiled to herself as she left the room and went down the stairs and quietly headed out the door, My dear sister doesn't need to know my every move.

"Guess it's time for slayage," Buffy muttered and pulled Mr. Pointy out of her drawer.

She quickly exited her room, snuck past the closed bathroom door and headed out into the night. She made her rounds down by the docks; nothing. She checked out the upper parts of town; nothing. Then she made her way to the graveyards. She patrolled two, which yielded nothing except a pathetic excuse for a vampire. She reached the third when she saw something that made her stop in her tracks.

"Spike? And Kathryn?" Buffy gasped.

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Author's Note: Thanks so much for reading guys! I love your comments, they keep me going :wink, wink, nudge, nudge:.

W1cked Angel: Glad you like Spike! I have to say that's my favorite Spike too, before he goes all soft.

Allen Pitt: The monks are thinking "Flesh and blood relative! She'll protect her!", little did they know what Kathryn was like. So… we'll see how it pans out.

Chosenfire28: I wish she would have reacted that way too. I didn't like Riley; he just needed to get out of there. She should've seen that in the show too. :sigh:

Krycek's Immortal Slayer: Yes Riley is a dummy. And yes… now it's time for Sebastian and Kathryn's "game". And I suppose a bunch of people would like to see her get pummeled… it'd be highly entertaining. ;-)

Summertime201 and BecomingwhaturmeantobeThanks so much for reading! Glad you're enjoying it!

Everyone that's read: Thanks!