A/N:So I don't usually write smut but this idea wouldn't leave me along. Enjoy! and review:)

This moment occurs after Season 5 Episode 20: Prey

Girls Just Wanna Have Fun

Jess strolled into her apartment after an extremely long day at work; she couldn't wait to order take out, take a nice long soothing bubble bath, and crash early. She would have made plans with her boyfriend: but as she was leaving the precinct, he was just going out on a case. Jess wasn't too disappointed. She was exhausted and she hadn't had a night to herself since she started dating Don five months ago. That's why she had purposely declined going to Sully's with the guys tonight. Jess tossed her keys on the kitchen counter and flicked through the mail she picked up on the way up. Bill, bill, and another bill, she thought and sighed, tossing them back onto the counter.

Jess made her way across the apartment to the living room and saw her answering machine was blinking red; she clicked the play button and walked into her bedroom, listening at the same time.

"Jessie, it's Dad," her father's voice came through the machine. "Haven't heard from you in a few days, just checking in. Are you coming to dinner Sunday? Sherry wants to know. Love ya."

Next unheard message. "Jess, Tasha and I are going to the China club Saturday night," Abby's voice echoed through, "if you're not too busy chasing bad guys or doing this mystery guy you should join us. Call me." Jess was a tomboy; she was always one of the guys, but Abigail and Natasha were her girls. The three had been best friends as long as Jess could remember.

"Sis, it's Michael," her second youngest older brother's voice came next. "Just calling to remind you, Mia's piano recital is next Thursday night. Do what you have to do to make it. Or you will be blacklisted by a six year old. Later, Chickadee." Beep. End of messages.

Jess made a mental note to return their calls later, and to talk to O'Bryan about getting Thursday night off. Jess walked over to her iPod doc and pressed play letting her favorite unwinding song blast through the speakers. "Oh girls just want to have -That's all they really want, some fun, when the working day is done, Girls - they want to have fun, Oh girls just want to have fun," Jess sang at the top of her lungs as she slipped her jeans off, followed by her shirt. Jess began to dance around moving towards her dresser to look for Don's NYPD t-shirt. She had claimed it after the first night they had spent together. The item was now her favorite thing to wear to bed; she continued to sing as she dug for the shirt, Where the hell did it go? It wasn't in the hamper since she hadn't worn anything to bed the last couple of nights.

"Oh girls they want to have fun, Oh girls just want to have," Don sang laughing as he leaned against the doorframe of her room and watched this amazing woman. She was the most beautiful creature he had ever known. She hadn't heard him come in since the music was so loud and her back was turned as she danced.

Jess spun around surprise, "How long have you been standing there? Better yet, how did you get in?"

"Long enough for me to see your little show; very sexy by the way," Don smirked. "And your door was unlocked, again."

"What happened to the case?" Jess asked as Don closed the distanced between them so he was standing behind her as she continued to search for the missing t-shirt.

"Closed," he replied placing his hands on her hips and pulling her back into him. He began to nuzzle her neck hitting that spot he knew would earn him a moan.

"Mmm," she moaned. Don smiled at her response. "I found it!" Jess said triumphantly pulling out the shirt. Jess moved out of Don's grasp and slipped it on.

"Why are you putting on more clothes?" Don demanded.

"Well," Jess smirked. "I have plans with Chinese food and a book. And I don't need to be in my underwear for that."

"I thought girls just wanted to have fun," Don chuckled.

Jess grinned before turning away from him and skipping over to the bed. She seductively spread herself across the bed; she lifted her torso up with her elbows. "Oh we do," she announced taking her two thumbs and looping them into the rib of her teal green thong. Sitting up, she slowly lowered them down her thighs to her feet. She lifted one foot out and raising the other foot; she twirled the panties before kicking them off in the direction of Flack.

Don didn't move; he could feel himself growing hard from her little strip tease, but he wasn't going to give in that easily. He looked down at the panties that landed at his feet and back at her. "Yeah, I bet you do," he replied. "You must have been thinking about having fun, when you chose these to wear to work this morning."

Jess giggled that intoxicating sound. "Well, tomorrow," she said strategically moving so the shirt rode up showing him her most delicate part. "When we're doing paperwork, you can be sure…I'll be wearing something very similar."

"Umm," Don groaned forcing his legs to move towards the bed, he positioned his knees on each side of her, effectively pinning her. Don lowered his head so his mouth was right next to her ear. "You're evil," he whispered. His warm breathe on her neck caused chills to run down her entire body.

"I've been told," Jess replied trying to regain some composure. He didn't need to know the power he held over her. Although, she suspected he had figured out that he had the ability to turn her to a puddle of jelly with just one look.

Don repositioned his head so his lips made contact with hers. The kiss started sweet and tender. He loved to kiss her: to taste her sweet lips. They always tasted like vanilla, strawberries, or watermelon depending on her lip-gloss choice for that day…today was watermelon. But the kiss soon deepened. Jess wrapped her arms around his neck, running her fingers wildly through his hair. Pulling him more firmly on top of her, their tongues fought for dominance, as usual, until one of them finally gave in - tonight it was Don. He let her explore his entire mouth with her tongue.

The need for oxygen forced them to break apart; Don hovered over her. Jess reached up to his tie and loosened the knot before yanking it over his head and tossing it to the floor. She took hold of his suit jacket and pulled it down over his shoulders; she got it down as far as she could from her position, so he lifted his body up and hauled it the rest of the way off tossing it to the floor. Jess reached up while Don was still sitting up and undid the buttons on his shirt, one by one; as she did she moved her head so her lips could collide with his chest. As she roamed his chest with her lips, Don removed his shirt letting it fall to the floor. Don slipped away from her, standing up long enough to push off his pants and add them to the growing pile of clothing on the floor. "Still thinking about that book?" he asked as he rejoined her on the bed; climbed back on top of her.

"Shut up," Jess ordered. Don smiled letting his hands fall to her hips to roam up her tone torso until each hand encountered a breast through her shirt.

He took them fully in his hands giving them each a gentle squeeze. Using the pads of his thumb he circled around the nipple causing them to become erect. Jess lifted her arms and pushed Don away. Raising herself to sitting position, she wrapped her arms around herself taking hold of the ends of her t-shirt and pulling it up over her head letting it fall to the floor. Don smiled, moved his head to find her lips once more and reached around her back; she slid them up to her bra hooks unclasping them with ease. Don reached back to her front and slowly lowered the strap down her shoulder placing kisses along the collarbone creating a trail until his lips found her breast. Don slowly began to kiss around her breast before taking the nipple completely into his mouth sucking and biting which elected a moan from its owner. Jess buckled her hips against Don, trying to get him to move those lips south. "Is there something you want, Detective?" Don laughed.

"You're a detective, figure it out," Jess teased rising her hips again.

Don chuckled but didn't grant her request. Instead, he shifted his mouth to her other breast and begin to pleasure it in the same way. Taking the breast into his mouth, he started to lick around the nipple. He could feel Jess began to squirm underneath him. She pushed on his shoulder trying to get him to take a hint. Don knew she was getting inpatient and frustrated with him; it made it that much hotter. Don took his hands and firmly pressed them against her hips to hold her still as he continued his attack on her chest.

Jess let out another moan. She knew what would cause Don to change direction but wasn't going to do it. No matter the torture he was putting her through, she was not going to beg. Jess let her hands stray from the stationary position of his shoulders down his back letting her nails dig in and whispered in his ear sweet nothings in French. Her speaking French had become one of his weaknesses. Don smiled giving into her wishes; he moved his lips away from her breast to the grove between and began to kiss his way down her body. His lips made direct contact with her inner thigh for a brief moment just long enough to tease her. His lips being so close to her sent shivers down her spine. Don turned and moved to her other thigh and began to glide his tongue along it up and stopping right before where she wanted, needed it to be.

"Mmm," Jess moaned. He was driving her insane and she needed him now, so she decided to give in. "Donnie, please," she begged.

"See all you had to do was use your manners," Don said in that cocky tone that turned her on. Without giving her the opportunity to respond, his tongue was inside her sensitive area. Slipping in and out, licking and flicking around her clit. "Oh," Jess groaned as his tongue went deeper hitting a more delicate spot. Jess trying to get him to go even further inside her. She was so close; however, just as fast as he had entered her, his tongued move smoothly out and didn't return. Jess was about to become very annoyed when instead of his tongue, one of Don's fingers entered her. Pushing in and out. "Oh, God yes!" Jess moaned as Don pushed another finger into her. That did it: everything inside of her exploded.

Jess panted for breath and Don smiled, happy with himself, and removed his fingers from inside of her. Jess regained control of herself; she grabbed hold of him catching him off guard and flipped them over, reversing positions so she was now straddling him. Giving her the control now. "Jess," Don groaned. He knew he was in for it now. He hadn't planned on giving her the chance to torture him back.

"What?" she smirked.

"Don't," Don pleaded. His teasing had made a nice tent in his boxers now he was done torturing her; he was ready for a release.

"Here's a lesson for you, Detective," Jess declared; she lowered her mouth down to his ear and whispered, "Payback is a bitch."

"Umm!" Don growled.

Jess lowered her head into the crook of his neck. She gently sucked on his earlobe. That simple action caused Don to wiggle underneath her. She grinned; she was going to enjoy this. Her tongue slid down his neck and she caressed that one spot on his neck that would invoke a response from him. Don groaned and went to move his hands so he could flip her. After all, he was stronger. "Don't even think about it," Jess warned against his neck. "Don't make me cuff you again, Detective."

Don stopped. Instead he let his hands move to her back, his fingers wandering down to her ass where he gave her a little slap drawing a gasp from her.

"You are in trouble now," Jess stated. Her tongue wandered over his chest and down to the rib of his boxers. Time to rid him of the constricting garment, she hooked her thumbs into the boxers and with a torturously slow pace pulled them down over Don's body. She tossed them and she gently grabbed a hold of him, fondling him. She moved her hand up and down his shaft. "Jessica," he cried out. She ignored his pleas and began to lick around the tip of his head. She could feel Don quiver beneath her, but she wasn't done yet. Jess began to flick and lick the tip with her tongue and grabbed his balls squeezing tenderly with her hands.

"Fuck!" Don swore grabbing hold of the sheets.

Jess opened her mouth wider, taking his fully erect penis completely into her mouth. She slithered up and down. "Jessie," he warned. She knew what he could take and he was now at the peak. And she was ready to feel him inside of her. Jess removed her mouth and repositioned herself so she was directly on him. With one sift movement, Don slid inside her. He grabbed hold of her hips and flipped her, so once again Don was on top. He slowly began pumping in and out of her. His pace started slow, Jess wrapped her legs around him resting just below his ass. Her hips pushing against him, begging him to speed his pace. Don granted her request and thrust deeper and faster inside her. Their bodies grinding together in perfect harmony.

Neither wanted to let go of their control first. However, Don thrust further inside hitting her g-spot and forcing Jess, once again, over the edge. She screamed his name with curse words mixed in English and French. Her screaming his name and the French caused Don to follow her over the edge.

Panting, Don removed his cock from her still wet pussy. Don pulled a sheet up over them, their legs still entwined with each other. Jess rested her head on Don's chest and Don wrapped his arm around her shoulder. They lay still for a few minutes both still attempting to catch their breaths. Don spoke first, "I have to agree with you."

"About what?" Jess asked confused.

"Girls really just want to have fun," Don smirked.