A/N: I don't own Glee nor Buffy: the Vampire Slayer, as well as any of the characters associated with the shows. So, this is a fic for a friend of mine. He gave me the prompt, then set me free. You can blame him. *grins* Also, I'm assuming that the people reading this already know the characters of both shows, so I didn't bother with 'initial description scenes'. Those get quite boring after a while.

Timeline: Season two of Glee and season two of Buffy.

Glee pairings: All current established pairings of the second season except Quinn and Sam are still together and there are no beards, which means Santana, Rachel, and Finn (and Karofsky) are single. This will be eventual Pezberry.

Buffy pairings: All established second season Buffy couples.

And now, on with the show~

"Sam's cheating on me."

"Way to say hello, Q. What has Trouty Mouth done now?" Santana raised an eyebrow at the blonde who had just sat down across from her.

The skin between Quinn eyebrows wrinkled, and she pressed her hands onto the table, leaning forward, "He's cheating on me. I know it. I've seen it."

Santana rolled her eyes. Sitting back, she crossed her arms. "He doesn't have the balls to cheat on you. Hell, if he wouldn't jump all up on this," she waved her hand up and down to encompass herself, "He ain't gonna be lookin' elsewhere."

Quinn glared at her. "Have I told you how furious I am at you for attempting to seduce my boyfriend?"

"Only, like, a million times. Let it go. Do you see me raggin' on you for gettin' knocked up by my boyfriend?"

The blonde's eyes narrowed.

Santana glared back.

Then, almost as one, they both relaxed.

"Bitch," Quinn smirked.

"Whore," Santana retorted.

"Poppy seed," Brittany plopped down into the chair next to Santana. "Today's a poppy seed muffin day," she clarified, setting a box of said muffins onto the table. "Rachel left them after the meeting today. So I took them."

Pausing reaching for a muffin, Santana's eyebrows rose. "There was a meeting? Glee?"

Quinn looked at her in surprise. "I was wondering why you weren't there. We just figured you were skipping. You didn't know?"

"No, I didn't know." Santana frowned, taking the muffin closest to her and starting to pull the cup off, "What was it for?"

"What else do you think?" Quinn rolled her eyes, "Nationals. Song selection. Solos. Her solos."

"Muffins," Brittany offered helpfully, peeling the cup off her own muffin. "She also talked about how and why she picked which muffins she did." Taking a big bite and swallowing, she smiled broadly, "I forgot why, but it was nice of her to bring them."

Santana nodded distractedly. "How did you guys hear about the meeting?"

Quinn shrugged. "Rachel came up to me in the hall. You?" She looked at Brittany, who thought for a second before nodding, "Same."

"Great." Muttering, Santana broke her muffin in half before taking a bite, "Gonna have to talk to the midget. Santana Lopez does not get excluded."

"Well, obviously you do," Quinn smirked at her, then sat back in her chair and sighed, "But back to me." She ground her teeth, looking down at the ring on her finger. "I cannot believe this!" she burst out, making Brittany and Santana look at each other before back to her, "Why do all of my boyfriends cheat on me?"

Brittany coughed. "Technically…" she started, shrugging her shoulders, "You cheated on Finn first…"

"That's beside the point!" Glaring at the other blonde, Quinn held her hand with the ring up, "This time, I have a ring. Sam gave me a ring. Boys who give their girlfriends rings do not cheat on them."

Santana snorted. "Are you delusional?" she asked her friend, tilting her head, "Rings are, like, the reason guys cheat."

Brittany nodded sagely.

Staring at her two friends, Quinn let out a noise of annoyance. "You guys are no help, you know that?"

"Look." Leaning forward and setting her muffin down, Santana narrowed her eyes, "Frankly, unless you start giving me specifics, I'm two seconds away from leaving you and Britts to your own devices. You're boring the shit out of me, Fabray, and I still have enough time to go find Puck for a quickie if I wanted to."

Giving Santana a disgusted expression, Quinn pulled her phone out. Clicking a couple times, she brought up a somewhat blurry picture of Sam holding arms with a short blonde female at the mall.

Santana raised her eyebrows. "Wow. Sammy must have grown some."

"Hmm? Grown what?" Already onto her second muffin, Brittany took the phone from Quinn. "Oh! She looks hot. Why's she so blurry, though…?"

"Give me that!" Snatching her phone back, Quinn frowned. "You see? B thinks she's hot! Sam's cheating on me for sure."

"Q, B thinks most people are hot."

Brittany nodded. "Except Pygmies. They freak me out. If we were to have sex, how could I do it without squishing them?"

That made Quinn crack a smile. "Thank you, B. But… What do I do?"

"Why don't you just ask him?" Brittany asked curiously.

"Uh, no, she can't do that." Shaking her head, Santana crossed her arms, "The douche'd just lie. No." She arched an eyebrow at Quinn, "You know what you have to do."

Quinn nodded glumly.

"What? What is it?" Looking back and forth between her friends, Brittany picked up her third muffin.

Santana took it from her, "No, that's enough, B, or do you want to gain weight and become ugly?" sliding the whole box away from her as well. Placing it safely on the other side of her, she turned back to her. "It's simple. Q," she glanced over at her, "What is it you have to do?"

Sighing, Quinn studied her ring again before curling her hand into a fist. She swallowed, blinking. "I have to gather evidence, and then I have to catch him in the act." Taking a deep breath, she firmed her shoulders and looked up. "And you two are going to help me."

"Okay, you got it?" Quinn repeated for the fiftieth time as she and Brittany stood next to her locker, "S and I'll distract him while you go through his wallet. Pictures, condoms… If you find anything like that, take it before you slip it back into his pocket."

"Can I take his money, too?"

Quinn sighed, shaking her head. "No, B. Leave that money for him to use on our date on Friday. Just pictures or condoms or… I don't know! Something else that proves he's an adulterous pig."

"Okay…" Brittany closed her locker door as she shouldered her backpack, "But what if he uses that money for the other girl? Wouldn't you want it then?"

Taking in a deep breath, Quinn audibly counted to ten. "Well, B, we won't know if he will or not until you search his wallet. So just search his wallet, okay?"

Pouting, Brittany nodded. "But I like collecting green paper…"

Opening her mouth, Quinn paused, then shook her head. "Where's S?" she asked, looking around, "I don't see her."

Brittany frowned, turning her head side to side to search as well. "Me neither…" she chewed on her lower lip, eyebrows furrowing. "Oh!" She brightened, pointing, "There she is! At the water fountain. …Hey." Cocking her head, the blonde asked, "Isn't that Sam and the girl he's cheating on you with coming up behind her?"

"What?" Whipping her head around, Quinn scowled, drawing herself up straight. "He… He's flaunting it in school, too? The nerve of him."

Brittany studied Sam as he came closer, smiling widely as he caught sight of his girlfriend. "He doesn't look nervous…" she trailed off, switching her gaze to the short blonde at his side. "That's weird…" Reaching out a hand, Brittany tugged on Quinn's sleeve. "Q… Why is S and the girl staring at each other? It looks weird…"

Santana was standing a step away from the drinking fountain, her eyes locked on the blonde girl, a deeply puzzled look on her face. The girl had the same expression, her steps slowing as she passed Santana. Both girls tensed, but a random student cut past Sam and in between the two girls, severing their stare. Blinking, the blonde shook her head and sped up to catch up to Sam, Santana crossing her arms and frowning intensely before turning and walking away in the opposite direction. Brittany took a step forward to go to her, but Quinn grabbed her arm, squeezing tightly.

"Stay with me," she hissed, putting a very big, very fake smile on her face as Sam and the girl finally reached them.

"Hey," Sam slid his arm around his girlfriend's waist, hugging her to him as he dropped a kiss onto her cheek, "Sorry I couldn't hang out with you yesterday, but I had to pick up Buffy from the airport, then show her around town. I figured that might be a bit boring for you."

"Buffy?" Quinn possessively wrapped her arm around Sam, prominently displaying the ring he had given her. Her eyes didn't leave Buffy, who stood there somewhat awkwardly.

"Yeah." Sam smiled. "This is Buffy Summers, my cousin. She's going to be staying with my family for a while. Buffy, this is my girlfriend."

Reacting to her name, Buffy smiled warmly, reaching forward to offer Quinn her hand, "Hey. Quinn, right? Sammy talks about you all the time."

Quinn slowly took it, still looking a little suspicious. "Funny. He never mentioned you."

Buffy shrugged, pulling her hand back and tucking some of her hair behind her ear, keeping her smile, "Well, don't blame him too much. We hadn't seen each other for a couple of years, you know, and it was a sudden thing, me coming to stay here." Then, turning to Brittany, she offered her her hand as well, "Hi!"

Brittany blinked, then straightened. "Hi," she smiled, accepting the shake, "I'm Brittany. What kind of name is Buffy?"

Buffy made a face. "You'd have to ask my mother that."

"Why can't I ask you?"

Sam cleared his throat, distracting Brittany, and turned his attention to Quinn. "Anyway. I'm sorry, still. Is there any way I can make it up to you?"

Quinn flicked her gaze from Sam to Buffy and back. She relaxed. "It's okay. I forgive you. We're still on for Friday, right?"

Sam beamed. "Of course! What kind of boyfriend would I be if I wasn't ready to treat you to dinner? I'm all set and everything." Suddenly, a concerned look crossed his face, and he dropped his arm from Quinn to start patting his back pockets. "Hey! Crap. I think I lost my wallet."

"…Yeah, it was really strange. Not like a vampire or demon or anything, but definitely hinky. Yeah. She certainly acted like I set off her Spidey Sense, too. I'm pretty sure she's human, though, as I didn't really get a slay impulse. Mmhm. I think she's one of Sam's – oh, that's my cousin – 's friends, so I'll have more info soon, hopefully. No, no, you don't have to do that. No, I got it under control for now. I'll let you know if I need you. Uh, that sounded weird. Yeah – yes. If I need you to come here, that sounds better. Eww. Oh, sorry, Giles, but thinking – okay, okay, eww. Not thinking that or speaking of it ever again. Yeah, sounds good. Night. Ahuh. I will. Night. Night, Giles!"

Hanging up the phone, Buffy shook her head. "Jeez, so wrong. Yuck." Sliding into the bed and switching off the light, she sighed. Punching the pillow to get it to feel right, she rolled over restlessly a couple of times. Finally finding a position that seemed to be comfortable, she started slowing her breathing.

She was just starting to drift off when the recognizable sound of a wolf howling split the night air, loud even through the closed window. Her eyes snapped open.