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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"Are you as bored as I am?" Kathryn sighed, setting down her shopping bags and plopping down on a bench at the Sunnydale Mall. She grimaced when she realized she had gum on the bottom of her black Prada boot.

Sebastian smiled at her and nodded his head, "Of course."

"I think we should… oh, spice things up a bit? Dare to make a little wager?"

"Ah, my brilliant sister. What have you got in mind?"

Kathryn smiled, grabbed Sebastian's arm and pulled him down onto the bench. She let him sit there for a minute or so, mulling over what she could possibly ask him to do. Finally he sighed impatiently and asked, "What Kathryn?"

"I've seen the way you look at your 'sister'," Kathryn said, giving her glossy brown hair a toss.

"Excuse me?" Sebastian looked a little bewildered.

"Don't feel bad, you're not blood related… besides I think it's… cute," Kathryn practically spat the last word. "Here's the bet. You bed our little Buffy. If you fail I get your precious car and your gay little journal."

Sebastian started to protest but Kathryn cut him off, "Tsk tsk tsk, no interrupting. If you win… you get something you've always wanted but could never have."

Sebastian scoffed, "What's that?"

"Me," Kathryn smiled.

He stuck out his nicely manicured hand, "Deal."

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"I found it down by the docks," Buffy informed the gang, including Giles, which was gathered in her living room.

"Evil jellyfish monster?" Xander joked.

"Could we sell it?" Anya asked.

Willow glared at her and turned to Buffy, "I can look through books at home and at the shop, see if I can find anything."

"Thanks Will, that'd be great."

Before they could continue the phone rang. Buffy quickly picked it up and hit the glowing TALK button, "Hello?... Oh hi mom."

Buffy left the room to talk to her mom and the rest of the gang tried to figure out what the glowing orb could possibly be.

"I still think we should sell it," Anya voiced.

"No one cares what you think," Willow snapped.

"Hey!" Anya and Xander shouted at the same time.

"For goodness sake will you all be quiet!" Giles cut in.

They all looked at him sheepishly. Giles, red in the face, continued, "Tara and Riley are the only civilized people… aside from myself… in this room. Can we please try to get on with this and figure out what this… orb… is?"

Everyone nodded and were about to start discussing again when Buffy came back into the room. She put the phone down and sat next to Riley.

"What's up Buff?" he asked, taking her hand.

"My mom. She said she wants Kathryn and I to spend 'quality time'. So tonight… that's what I'll be doing. See if you guys can find out anything else about the wanna be light saber and let me know as soon as you can."

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Gunn prowled one of Sunnydale's many graveyards, trying to get rid of some pent up energy. He had a stake in his right hand and a knife hidden up his other sleeve. He was itching to find the guy his cousin had sent him after, but right now wasn't the time.

He saw a shadow move to his left and he froze. He watched silently for a few more seconds before a vampire suddenly flew at him out of the bushes. Gunn punched the vamp in the jaw and kicked him in the gut. The vamp lashed out to punch him, but Gunn jumped back. He ducked another punch and tripped the vampire. The vamp fell to the ground and Gunn quickly dusted him.

Suddenly three more vamps appeared from behind the headstones.

"This is one hell of a trip," Gunn muttered.

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"So, Riley's not your first boyfriend then?" Kathryn asked, sounding rather surprised.

"Uh… no," Buffy answered, confused.

"How many would you say you've had?"

What kind of conversation is this? Buffy asked herself, but then answered. "Well, Owen didn't really count." Considering I almost got him killed. "Then… there was Angel," Buffy stopped for a moment, but quickly started up again, "And then Scott and… well Parker shouldn't count either. Then Riley. So 3, give or a take."

"This Angel person," Kathryn prodded, "he seemed to have some sort of… impact… on you."

"Well, he was my first love," Buffy was surprised she was sharing this with her-never-there sister, but she continued, "We had some rough patches. Now he's off in L.A. How about you, boyfriend-wise?"

"You win some, you lose some," Kathryn answered nonchalantly.

"What about Sebastian?" Buffy almost kicked herself for asking.

"With boys, I wouldn't know." Buffy cringed because she hadn't made herself clear, and felt like a fool. "But with girls… " Kathryn trailed off.

"Yes?"

"He has an extensive list. I'm sure he hasn't talked to most of them in years. Probably not after the first date. He's a heartbreaker." Well that's a light way of putting it.

Hopefully he wasn't anything like Parker. "Did he just not call them after dinner and a movie… or… ?"

Kathryn laughed out loud at her sister's naïveté, "Some might call it that… or dinner and a show. Sometimes just a show."

Buffy's face paled, "Well he doesn't seem like the type to do that."

"You have a lot to learn dear sister, a lot to learn."

Buffy looked at her and then out the window into the night, So do you.

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Author's Note: Sorry that the chapter's not as long as the last, but hope you enjoyed it! Thanks for the comments guys! Please keep reading and reviewing!

You Know Who: Always a pleasure to read your comments my dear. :-D

WickedmoemoeShe might… she might not… you will see. And I'm not an uber-fan of Riley either… so I think we're on the same brainwaves here.

RavynJensenI'm glad you like it so far! I'm still working on what I'm adding in and what I'm not. Any suggestions would be great as well!

Krycek's Immortal Slayer: Thanks so much for reading! And I'm excited about Kathryn's reaction as well!

LadyJ of moonshallowParings so far are: Anya/Xander, Willow/Tara, Buffy/Riley (at the moment… 'cos it has to be… but like I said before… he's not my favorite), and the other two… we'll find out.

Allen Pitt: I'm glad you like it! And it is rather strange concept, heehee. I'm excited about writing it though. And there will be much with the wackiness.

W1cked Angel: I was just establishing character… and at this point in time Anya isn't their favorite person… or a lot of the time (for Willow at least). It'll all work out.

Again, thanks everyone!