A/N

So I guess now that I'm turning this into an actual story, I need to decide when it's set. As I introduced the idea of Kevin hooking up with Garcia in a previous chapter, I'm going with late season 3 (so Rossi is around rather than Gideon). Only change from the show is that JJ is (clearly) not dating Will – in secret or otherwise!

Her encounters with Emily throughout the day had left JJ in a state that certainly wasn't appropriate for work. How she made it through the rest of the day, she would never quite be sure. But as she approached the end of her workload for the day, one thing was for sure. She was going to be spending a considerable part of her evening in her bed. She just hoped that she wouldn't be alone.

She pulled out her phone and typed a message to Emily, who she knew was also still at her desk.

JJ: I need you. Alone. Tonight

She didn't have to wait long for a reply, and could feel herself growing flushed at the direction the conversation was taking.

Emily: I'm not going to argue with that. Tell me what you have in mind

JJ: I want you back between my legs. Only this time, we'll lose the clothes

Emily: Thinking about that is making me very, very wet

JJ: God. I've been soaked since we kissed this morning. Having to try really hard not to take matters into my own hands right now

Emily: Not sure whether that makes me more aroused or annoyed. But please don't….I want to be the one to make you cum tonight

JJ: Fuck. Not helping the situation right now

Emily: Your place or mine?

JJ: Mine

Emily: I'm leaving now. I can't think about anything else except fucking you right now. Be with you in an hour

JJ: Trust me, I'll be ready for you

Putting away her phone, the blonde waited what she considered to be a reasonable period of ten minutes, half heartedly sorting the files on her desk into stacks, before heading out for the night. She waved goodnight to Reid, who was the only one left in the bullpen.

She made it home in record speed, and spent twenty minutes panic tidying. Not that she planned on giving Emily the chance to wander round the house. Next, she jumped in the shower, before finally starting to worry about what to wear. What does one wear when they've invited someone round to effectively take all their clothes off?

Thinking about it, clothes seemed somewhat unnecessary. She pulled out a matching baby blue underwear set from the back of her drawer. She'd bought it months ago but had never really had an occasion to wear it. Now seemed as good a time as any. Putting it on, she checked herself out in the mirror. Satisfied that Emily wouldn't be able to resist her, she pulled on a satin robe and headed downstairs.

As she took a half empty bottle of wine out of the fridge, she heard her phone ring and got it out of her purse. Seeing Emily's name on the screen, she felt her stomach lurch.

"Hey" she answered softly "is this you calling to let me down gently?"

"Are you kidding?" Emily's deep laugh came through the phone "I would say there's nothing gentle about what I plan to do to you tonight, but I can be hard…gentle…any way you want me to be"

"Fuck" JJ gasped.

"I just called to say I'm on my way, and to apologise if I'm a few minutes late. I uh…to be honest, I kind of got distracted thinking about all the things I want to do to you"

"I sincerely hope you didn't start the fun without me"

"No, I promise. I wouldn't do that. But god I'm ready to explode"

The blonde moaned "God you'd better get here soon"

"I will but…I'm not risking an accident. Can't risk the embarrassment of having to be cut out of my clothes. Not when I'm not wearing any underwear"

"Oh fuck Emily"

"See you soon"

The brunette ended the call before JJ could say anything further. With shaking hands, she poured herself a glass of wine and leant against the kitchen counter, sipping it slowly. Part of her couldn't quite believe that Emily was on her way to her house. Or, more accurately, Emily sans underwear was on her way to her house. To the other part of her, the situation felt very, very real. Almost too real. Her whole body was tingling, and all rational thought had practically disappeared.

By the time Emily knocked at the door, JJ had finished her glass of wine and was just considering pouring a second. She opened the door, and her jaw dropped at the sight of the brunette in what was a very short black dress.

"Can I…come in?" Emily asked with a smirk "I decided that a jacket spoiled the full effect of the outfit, but it's kinda cold out"

"Oh my god, yes, sorry" JJ stepped back to let the brunette in.

"Thanks. And uh…" dark eyes gazed up and down the blonde's body "wow"

JJ tilted her head and raised an eyebrow cockily "Uh wow? How eloquent of you Ms Prentiss"

"Some things…" the brunette stepped closer, leaning in to slowly untie JJ's robe "are better said without words"

At that moment, she captured the blonde's lips in a scorching kiss. As her tongue delved into JJ's mouth, she slid the robe off her shoulders completely, letting it pool around their feet.

"Ok" Emily breathed, pulling back from the kiss to take a look at what she had revealed "I take it back. I said wow before…but now it's really, really wow"

JJ let out a throaty laugh "Are you sure you didn't crash on the way over and hit your head? Because the Emily Prentiss I know would never reduce her vocabulary to that level"

"Well maybe that's because you've never seen Emily Prentiss staring at the hottest thing she's ever seen before"

"Smooth"

"I try"

"Kiss me again"

Emily didn't need asking twice, and stepped forwards, cupping the blonde's cheeks. She sucked on JJ's top lip, running her tongue over it before parting her lips and letting her tongue brush against the blonde's once again.

As their tongues made contact, JJ pressed herself forwards, reaching down so that her hands grabbed the back of the brunette's bare thighs and pushed their bodies together. With their mouths moving in synch, she slowly dragged her fingertips up Emily's legs, catching the hem of her dress and pulling it upwards.

The moment that JJ's fingertips slid under the brunette's dress, moans emitted from both women's throats. Almost immediately the blonde grabbed Emily's ass cheeks, squeezing them and pressing their pelvises together as firmly as possible.

"You weren't kidding about going commando" JJ groaned into the brunette's mouth.

"I would never joke about something so important"

The blonde practically growled as she pressed her lips back against Emily's. Her fingers dug into her muscular ass, kneading it as she revelled in the way that the brunette's body responded to her.

Emily pulled away from the kiss, only to reattach her lips to the blonde's neck.

"God" JJ breathed "I've been thinking about this all day"

"I don't know how you do this to me" the brunette murmured, slowly dragging her hands up and down JJ's sides.

"Do…uh…" the blonde swallowed "do what?"

"Distract me this much. Get me this worked up at work. All day I've been wanting to touch you…but god, this was worth the wait"

Emily's hands roamed freely over the blonde's body, taking the time to cup her breasts before sliding round to drag down her back and grab her ass. JJ used her nose to nudge against the brunette's, causing her to tilt her head back up so that their lips could meet again. Their tongues danced together as they began to grind against one another, desperately seeking the friction that they'd both been seeking all day.

Slowly, JJ began to steer the brunette backwards towards the kitchen, pausing for Emily to kick off her heels as they went. She stopped moving only when the brunette's back hit the counter, and almost immediately ran a hand round over her hip and let it dip between her legs.

"Oh my god" she breathed, feeling the wetness coat her hand "have you been like this all day?"

Emily nodded, kissing the blonde firmly "Since you kissed me in the bathroom. I wasn't kidding…you make me so wet"

"I…I made you like this?"

"Jennifer" the brunette's voice was husky, causing JJ to pause a lift her eyes to meet Emily's "you really don't get how much you turn me on, do you?"

JJ nodded slowly, letting her fingers slide between the brunette's folds "I think…I might be getting an idea"

"Please…" Emily whispered.

"Hmm" the blonde bit her lip, moving her fingers excruciatingly slowly "I don't know, maybe I need to tease you a little more"

"Are you kidding?" the brunette glared at her "All day. You've had me on edge all fucking day"

"Ok…you're a little scary when you're mad"

"Not mad" Emily corrected "Incredibly, incredibly horny. And pretty fucking desperate for you to touch me right now"

With her eyes focused on the brunette's, JJ slid a single fingertip up and began to circle her clit "You mean like this?"

"Yessss" Emily hissed "please…please don't tease me anymore…"

The blonde whimpered. Never in her life had she imagined that she would see Emily so…completely undone. Pretty much every fantasy that she had ever had about the brunette had involved Emily taking charge. And while the thought of that undeniably turned her on more than she had ever thought possible, the state of the brunette in front of her was a whole other level of arousing. Seeing Emily in this position…so desperate, needing her so much, responding so vividly to every flick of her finger…witnessing this whole other side of her made JJ's body throb with excitement.

"Get up on the counter" she rasped.

The brunette swallowed and nodded, following JJ's instructions and lifting herself up on the counter behind her. Her dress bunched around her waist, leaving her fully exposed to the blonde.

"God" JJ breathed, taking in the sight before her "you really do look good enough to eat"

Emily laughed "When I'm less turned on, remind me to make fun of you for the cheesiness of that line"

"Sure" the blonde stepped between Emily's legs, pressing their lips together and inhaling deeply "but I think you'll be less cocky when I'm licking you dry"

"Ok" the brunette grabbed JJ by the hair "I need you, and I need you now"

"You really do, don't you?" JJ asked softly.

"Feel this" Emily took the blonde's hand and slid it between her legs "and don't you every dare question the effect that you have on me"

"Emily…." the blonde whimpered.

"Make me come, Jennifer. With your mouth, your fingers, I don't care…right now I just need it to be you"

Moaning again, JJ leant forward to kiss the brunette deeply before lowering her head and burying it between her legs. She licked up the length of the brunette before focusing in on her clit. Using her thumbs to spread Emily open before her, she let her tongue drag over the hardened nub over and over again. The pace of her licks increased and she began to alter the pattern, feeling the brunette's hips rise up off the counter to grind against her face.

"So good" Emily panted "god I don't ever want you to stop doing that"

The blonde's cheeks flushed but she continued on her mission, alternating between flicks of her tongue and taking the entirety of Emily's clit into her mouth.

"Shit!" the brunette growled "Seriously don't stop…Jay…please…"

JJ moaned against the brunette's centre. Her tongue had a mind of its own, drawing patterns over Emily's clit as she felt her hips rocking with increasing vigour.

"Fuck fuck fuck!" Emily chanted.

Feeling the brunette gripping her head tightly and pressing it against her, JJ kept moving her tongue, the sounds of Emily's cries filling the air. The thighs either side of her head clenched, holding her in place as she continued to draw every last drop of pleasure out of the brunette.

As Emily finally released her grip, JJ lifted her head to take in the sight of the brunette, head tilted back, legs still spread as her chest rose up and down. She slowly slid her fingertips up the brunette's thighs, waiting until her head lifted again to press their lips together softly.

"God you're hot" JJ murmured unconsciously, letting her lips brush against the brunette's again.

Emily smiled, returning the kiss. She slid her hands into the blonde's hair, guiding her head backwards slightly so that she could look into her eyes.

"I don't think I've ever needed an orgasm quite as badly as that one"

"I…" JJ blushed, looking down as she slid her hands up and down the outside of the brunette's thighs "I'm sorry. I wanted you so much, I…."

"Don't" Emily interrupted firmly "Don't you ever, ever apologise for making someone feel that good. And please stop underestimating yourself. You are so incredibly attractive. I've wanted to sleep with you for a really long time. We have this…sexual chemistry…"

"Oh believe me, I know" JJ cut in "I'm feeling the uh…chemistry…right now"

Slowly, Emily crossed her arms across her body and pulled her dress up over her head. With her eyes focused on the blonde's, she reached behind herself and unhooked her bra, sliding it down her arms and letting it fall to the floor.

"How about now?" she asked huskily.

"I feel like francium"

The brunette laughed "The most unstable naturally occurring element? Who are you, Reid?"

"Hey, you knew the significance of it, geek"

"Still hot, even when you're trying to be insulting" Emily slid down from the counter.

"And you're hot when you're cocky"

"I prefer self-assured" the brunette leant in, leaving a lingering kiss on JJ's lips "and I think it's time you showed me your bedroom"

"Hmm. I guess you might just pass the entry requirements"

Emily raised her eyebrows and stepped forwards, cupping the blonde over her underwear "You want to re-think that one?"

JJ swallowed "You make your case very well, Ms Prentiss"

"Show me the way"