Disclaimer: NCIS and its characters do not belong to me.

Title: Resistance Training

Rated: M

Author: WithTheGrain

Spoiler: None

Pairing: Abby/Gibbs

A/N: Written for the Gibbs/Abby Shipper Forum weekly Creative Drive for the prompt 'resistance'.

Abby walked into the exercise/workout area in the NCIS building. It was a Wednesday evening and the place was busy. All NCIS employees had free access to the facilities, so they took advantage of the weight lifting machines, boxing equipment, treadmills, and the aerobics classes that were scheduled on a regular basis. This particular evening, Abby had come to check out a new class being offered on resistance training. She had signed up, so she knew there would be a spot for her in the class.

It wasn't the type of training that was aimed at building bulging muscles, which of course, Abby didn't want anyway. Resistance training helped to strengthen and tone skeletal muscles, increase bone mass, and improve overall health and well-being. Abby felt that prominent muscles were best seen on men, especially any man whom she regularly worked with. Tony was fit because his preferred type of exercise was running, so his legs were strong and solid. McGee's preferred type of exercise was pounding away at his computer or typewriter. She assumed his fingers were probably strong, but he could definitely benefit from some regular weightlifting. Of course, her favorite man, Special Agent Gibbs, had his own exercise routine in his basement, working on his boats and other wood crafts. No doubt, all the hand tools he used contributed to his strength and power and amazing body.

So, here she was, eager to participate and get in shape. Since she was a bit early for the class, she casually walked around, wondering if she would see one of Gibbs' team working out.

"Hey, Abby!" a deep voice called to her.

She turned towards the boxing ring. "Oh, hi, Phil. How's it going?"

There was blood dribbling from a cut on his lip as he removed the padded headgear. "Couldn't be better now that you've brightened my day," he responded and grabbed a bottle to squirt water into his mouth.

"Abby! It's been a while, girl!" This from a woman who emerged from behind a large heavy boxing bag. "Damn, you're looking fine!"

"Linda!" Abby exclaimed, moving forward and giving her a tight hug. "I didn't know you were into boxing!"

"Oh… I don't get in the ring, but punching these bags keeps my arms in shape and relieves any pent up frustration," she said laughing.

Abby laughed with her and continued walking. There were so many people; so many she didn't know. A long row of treadmills were just ahead and when she got to them, she recognized Meagan and Nancy from the legal department.

She spotted Dean from finance and smiled at him. "Abby, I'm nearly done here if you want this machine," he puffed.

"Oh, thanks, Dean, but I'm just waiting for a particular class to start," she responded.

"You wanna get together after?" he asked with a wink.

Abby gave him a sly smile. "Maybe another time. Give me a call."

"Count on it," he called after her as she continued on. Just ahead was Jon on the bench press and she stopped to watch. He strained and grunted as he lifted the weight above his head then rested it back down. "Impressive, Jon," she purred.

As he sat up, his face was beet red with sweat trickling down his temples. "Aaabbeeee," he crooned. "Care to try? I can give you some pointers."

"Later, Jon," she said and winked. "I've got to get to a class that's about to start. How much did you lift there?"

"360," he responded and tensed his bicep muscle. "Wanna feel?"

Abby stepped forward and reached out her hand, playing her fingers over the hard bulging muscle. "Impressive," she said with awe. "You must work very… very hard."

"It's what the ladies like, isn't it?" he flirted.

Abby nodded. "Definitely." She walked on towards the area of separate rooms where specialized exercise classes were held. Most of the rooms had their lights turned off and the doors closed, since they were not in use, but ahead, was an open door where a steady stream of people were entering. Abby knew that was her class.

Unexpectedly, the door to one of the unused dark rooms was pulled open and a hand reached out and yanked Abby inside. She was about to shriek when a large callused hand covered her mouth and she was pressed back against a wall. "It's just me, Abbs," Gibbs growled.

Abby gave him an angry swat on his bare arm. "Dammit, Gibbs! You almost made my heart stop!"

He stood in front of her at arms length with his palms pressed against the wall on either side of her. "You wanna tell me what the hell you were doing out there?"

Abby could see he was irate and could hear it in his voice. "I'm here for a class on resistance training," she answered in confusion. "Do I need your permission for that?"

He glared at her for the sarcastic answer. "Resisting all the guys trying to pick you up, is that it?"

Abby used her hands to push against one of his arms, annoyance building within her. "Move! I don't want to be late for my first class!"

Gibbs held his ground and even lowered his arm when she tried to duck under it. "So, which one are you meeting later? The big ape on the bench press or the one that got beat up in the ring? Or will it be Dean-the-machine on the treadmill?"

Abby was mortified and raised her hand, giving Gibbs a slap across the face. "How can you say those awful things to me!" she hissed. He took a stunned step back, so she slapped him again, this time harder. Instantly she covered her face with her hands and whispered, "Oh, god, Gibbs, I'm sorry. I'm so sorry! I can't believe I did that!"

"Hit me again, Abbs!" he demanded.

She dropped her hands and looked at him with wide eyes. "NO! I didn't mean it, Gibbs! I didn't mean it!" Tears sprang to her eyes.

"I deserved it, Abby," he said gruffly. "I'm a mean bastard for what I said!" He look a couple of long deep breaths. "It's just… I got so…"

Instantly, Abby reached up and wrapped her arms around his shoulders, pulling him into a bone-crunching hug. She felt Gibbs' arms wrap around her back. "Why would you say those things to me, Gibbs? Why?"

He dropped his head and sighed into her neck. "I saw all the looks the guys were giving you out there. It wasn't right. Then you responded to some and I…"

"You what?" she asked, needing him to finish; wondering if he was jealous.

Slowly his hands slid up her back then down again and she could feel his hot breath against her neck. "I didn't like it, Abbs."

She didn't dare pull back and look at him for fear that he would suddenly clam up and walk away. "You know I flirt," she said softly. "I was just flirting. It didn't mean anything."

"I know… I know," he mumbled. "I don't like it when you flirt…"

"You don't like me to flirt?" she asked. "I thought you always enjoyed it whenever I flirted with you."

"I do," he responded slowly in a husky voice.

Abby leaned back to look into his dark blue eyes. "You don't like it when I flirt with other guys." Gibbs moved to break away but she quickly grasped his face between her hands. "I don't like it every time a red head walks into the bullpen," she confessed.

Gibbs lifted his hands to rest atop her shoulders. "I don't even notice them anymore, Abbs."

Abby could see that his anger had disappeared and he was growing more relaxed. "But you notice when I flirt. And you don't like it," she murmured and pulled his face close enough so her lips brushed against his. Abby knew she wasn't wrong with interpreting his feelings, so she kissed him lightly, softly.

Gibbs stood still and accepted the kiss. All the time he had been watching her flirting with those other men, this was what he really wanted. He kissed her back tenderly. "We can't do this," he finally spoke, breaking away.

"We're just kissing," Abby whispered. "Just a little more…" She met his lips as they came closer and felt her nipples tighten. Gibbs' hands fell to her hips and he drew her against him lightly. Abby's fingers threaded into the short hair on the back of his head and she pulled him into a more passionate kiss. When his hot tongue swept along her bottom lip, she opened her mouth and moaned.

Abby's moan caused the hunger in Gibbs to build and he pressed her against the wall with his long hard body. She moaned again as his tongue searched her mouth and slid into the valley behind her upper lip. His hands glided from her shoulders to her breasts and he cupped them and massaged them and flicked the hard nipples through her tank top and soft bra.

Tilting her chin up, Gibbs' mouth slid to her neck where he sucked and nibbled. Abby could feel the dampness between her thighs and with her hands on his hips, she pulled and pressed against his heat. They both wore shorts, so she easily felt his hardness press against her. "I want you, Gibbs," she said raggedly. Her hand slipped between their bodies and she rubbed along his pulsing length.

Gibbs groaned in response to her touch. "What about your class?" he mumbled against her neck, then began torturing the sensitive area around her earlobe.

Abby's hand slid beneath the elastic waistband of his shorts and boxers and she took him fully in hand. His flesh was hot and hard, thick and long and Abby rubbed her thumb over the slickened tip. Gibbs gave a powerful thrust of his hips and Abby now used her other hand to slowly work his shorts and boxers down off his waist. She stroked him with one hand as her other hand freed him completely. "Oh, god, Gibbs," she whimpered.

Gibbs couldn't believe how quickly things had escalated between them, but there was no way he could stop now. For years he had longed for Abby Scuito but never thought she felt the same way. Now she had him half naked and he knew what she wanted, what they both wanted so badly. He felt an urgency pounding through his body and his hands pulled her shorts and panties down off her waist. With heavy breathing and gasps and nibbles, they kicked off their shoes and stepped from their clothes to tumble to the mats that covered the floor.

Impatiently, Abby lay on her back and settled Gibbs between her legs. Their mouths were pressed together in a furious kiss as their tongues dueled. Her hands slid up his back and she squeezed the muscles beneath her palms. When her hand moved to position him where she wanted him most, he braced up on his elbows and locked onto her soft green eyes. Slowly, gently, he slipped into her and they both groaned as immense pleasure swept through their bodies. Abby wrapped her legs around his waist and pulled him in as far as possible then they stilled and smiled wonderously at one another.

"I've wanted this for so long," Abby breathed heavily.

"Abby, you have no idea…," Gibbs rumbled low and heavy. Slowly his hips moved and he withdrew almost completely before sliding in gently again. He continued to move above her steadily and gradually the feelings between them increased until Abby was clinging and whimpering with each of his thrusts as he pounded her against the mat. Abby careened into her climax with a scream escaping her throat before Gibbs could bury it beneath his mouth. He didn't stop as the waves pulsed through her body and then instantly he lifted his head and grunted with one more powerful thrust.

Seconds later, he looked down on her with a grin she had never seen before and she reached up to caress his cheek with the palm of her hand. "Hope no one heard us," she said tiredly, "or comes in."

Gibbs gave a chuckle then carefully withdrew and rolled to his side. His breathing was beginning to settle. "You're incredible, Abby Scuito," he said, pulling her into his arms. "Guess you missed your resistance class and I'd say you failed miserably. I didn't see any resistance from you at all," he smirked.

"I could never resist you, Gibbs," Abby grinned, knowing he was fully aware that her class was about muscle toning and not about turning down sexual advances.

"Gibbs pressed his soft lips against her forehead. "Come home with me tonight?"

"Oh, yeah," Abby responded, tilting her chin up and giving him a wide smile.

Standing up, Gibbs pulled Abby to her feet and gave her a lingering promising kiss before they tugged their clothes back on. He drew her close one more time and kissed her hard but brief. "I'll never get enough of those," he murmured then walked briskly towards a side door. "Hit the showers, Scuito, and I'll meet you out front in ten minutes," he said happily.

Abby stood motionless with a huge grin as she watched him disappear through the door, then she moved towards the front door to pass through the exercise area to get to the showers. And damn! Working out with Gibbs was better than she ever imagined!

A/N: Thank you for reading. Please review!