A/N: Couldn't resist doing more Abby/Matt smut, sorry!

She knew it was wrong, but it didn't stop her from thinking about it. Ever since that afternoon in the storage cupboard, she'd had sex on her mind; specifically sex with Matt. It had only lasted a few minutes, there was very little foreplay and they hadn't even undressed; yet it had been damn good. He had left her feeling like she was walking on air and it took several minutes for her body to stop tingling – what would he do to her if they could have sex with no time limit or concern about being caught? That was what he'd said when they parted "The next time we do this..." He was already assuming she'd come back for more and at the time she wasn't sure, but now...

She wanted to know what it would feel like to have his tongue flicking her clit and pushing inside her wet pussy, what his cock would feel like in her mouth, what he would taste like... It would be refreshing to be with a man that knew what he wanted and would challenge her sexually. She wanted to be the one being led for a change; to try things she'd never done before... Had Matt been serious or was that just a parting line?

She'd sent him a text message, "Have you thought about somewhere more comfortable yet?" He would either be wondering how the hell to answer and let her down gently or be pleased she was making a move. She'd only just put the phone down on the desk when it started to ring – it was Matt.

"I've thought of nothing else," he said, his voice sounding breathy. "If you're serious, then I have a plan."

"I don't joke about things like this," Abby replied. "And if we do this, then we do it properly. I don't just want another quickie in the cupboard." She could feel her body shaking; was she actually doing this?

"Me either. We deserve better," Matt said. "My flat would be ideal, we just need an excuse for you to be away for a few hours."

"We'll think of something, but let's make it soon. I don't want to wait any longer than we need to." Her heart was pounding, and if Matt said to go now, she would drop everything.

"Leave it with me." he said, and ended the call.

Abby's head was reeling. Could she actually do this? It was a dangerous game to be playing and someone could get hurt; particularly Connor. Her sensible, rational side was telling her to end this now; be satisfied with what she had, but her body was telling her that she needed this. She tried to go about her work as usual, but Matt kept sending her suggestive texts – fairly innocent at first, but when Abby started replying with her own naughty thoughts the texts grew increasingly filthy. This was all part of the game; a prequel to what was eventually going to happen.

The texts continued after they'd left the ARC, and Abby had to put her phone on silent so that Connor wouldn't get suspicious. She had to stifle a giggle when Matt sent a photo of his cock "Something for you to dream about as you sleep." She made her excuses and went to bed early, stripped naked and spread herself across the bed and then took a photo of as much of her body as she could with her phone. She sent it to Matt with the message "Pleasant dreams."

-o-

They'd been in the ARC almost two hours, and they were still exchanging filthy texts but no indication as to when they would act out what they were suggesting. If it was going to be the weekend, then Abby would be able to come up with a cover story pretty easily, but she didn't think she would be able to wait that long. If this went on for much longer, she would have to make use of the storage cupboard again.

They were called in for their weekly team meeting with Lester, and Abby sat opposite Matt so that she could watch him. Whilst Becker was doing his presentation, Matt texted "I have a massive erection just thinking about you." Abby was about to reply when she heard Lester ask Matt for his report.

"And please tell me that you're all going to be doing something constructive when there's no anomaly to investigate!" Lester said. "I don't pay you to sit around drinking coffee all day."

"I believe Connor is busy on a project for Philip." Matt glanced at Connor, who nodded to confirm what he'd just said. "Jess is working on some upgrades to the internal network, Becker and his team you already know about … and Abby and I have an appointment this afternoon at an exotic breeds centre with a view to possibly using some of their experience in the re-designing of the menagerie." Abby looked up at Matt and caught a flash of lust in his eyes. This was it. It was going to happen this afternoon. Her throat tightened and her stomach felt like a washing machine on spin cycle.

As they walked away from their meeting, Matt called out. "We leave at 1pm, Abby. I'll drive, and I'll take you home after so Connor had better have your car keys." 1pm was three hours away – it seemed like an eternity. Getting a text that said "I'm going to make you come so many times your body will be reduced to a quivering heap." didn't help. She had a feeling that was no idle boast; it was a statement of fact. She tried to do every single boring and mundane job she could think of to try and keep herself occupied, but as 1pm grew closer her body was tingling in anticipation. The texts had promised so much, the last 24 hours had been one long foreplay session.

She took the car keys to Connor and he barely acknowledged her. She sighed as she left his lab, this was the problem. She loved him, but they had settled into "comfortable" and "dependable" far too quickly and Abby longed for the early days where sex with him was still exciting. Maybe she just needed to get this out of her system; scratch the itch so to speak, and then everything would be OK again.

Matt was in the car waiting for her. She got in and he pulled out of the car park. "We need to get our stories straight." he said. "This exotic breeds centre we're supposed to be at turns out to be a none starter – it wasn't quite what we thought it was going to be and we felt uncomfortable approaching the staff for assistance."

"OK," Abby nodded. "I can patch together a report tomorrow, I've seen enough of those places to be able to make something up."

Matt nodded then swallowed nervously. Abby was nervous too and felt slightly sick as the reality of what they were about to do began to dawn on her. She glanced at him, watching him concentrate on his driving, and for a split second she almost asked him to turn around and go back to the ARC. Then she thought back to the afternoon in the storage cupboard, and all the things he'd said in his text messages and smiled. The nerves disappeared and were replaced by a shiver of excitement – she had to do this.

They practically fell through the door of Matt's flat in their haste to get inside as quickly as possible. Abby didn't have time to take in any details of what his lounge looked like; Matt was practically dragging her to his bedroom as their mouths crushed together. By the time they had reached his bed, they were both breathing hard and tugging at each other's clothes. Both their shirts were tossed to the floor, and then their limbs tangled together as they fell onto the bed. Abby rolled so that she was on top and she ran her fingers through his hair, sighing into his mouth as she claimed it with a deep, passionate kiss.

Matt slid his hands down her body, one resting in the small of her back and the other gently squeezing the soft flesh of her backside as he responded to her kiss with an equal fervour. She was unfastening his belt and fumbling with the zip on his jeans. "Hey, slow down!" he said. "We have the whole afternoon, there's no need to rush this."

"Sorry." Abby blushed. Matt was nibbling and licking her ear and moving slowly towards her neck, sending a shiver straight through Abby's body. "Mmm!" she groaned. "That feels really good!"

"Yeah?" Matt ran his tongue from behind her ear around to the curve of her throat. Abby threw her head back and he responded by licking her up to her mouth again and claiming it with his. As they kissed, Abby ground herself against Matt's arousal. She felt a familiar tingle in her groin as the anticipation grew in intensity; it seemed everything that had been promised in their text messages would finally happen.

Matt's hands were now tugging at her bra, so she reached around and unfastened it. He tossed it to the ground with a flourish, then took one of her breasts in his mouth. He alternated between teasing the nipple with his teeth and soothing it with his tongue as he made contented suckling noises. Abby breathed hard, stroking his hair. She'd imagined him doing exactly this to her, but the reality was so much better. He grasped her other breast with one hand; cupping it tightly, whilst his other hand slid inside her waistband.

Breathing hard, Abby undid the button on her jeans to allow him easier access. His fingers were under the elastic of her knickers immediately, causing her breath to hitch. He rested them just millimetres from her clit, tantalisingly close. She pressed against him, wanting him to touch her there but he remained still, focussing on her breasts instead.

"Please Matt!" she begged, the arousal surging through her body almost too intense. She was wriggling herself out of her jeans and knickers; he might be taking his time but she wasn't willing to wait. He bit her nipple hard, making her whimper out loud, then he pushed a finger into her wet core. "Yess!" Abby gasped out. He began to move the finger in and out then added a second, stretching and massaging her whilst his tongue flicked over her sensitive nipples. Her body began to tingle and she could feel her muscles rippling around his fingers as the first of the many orgasms he'd promised took hold.

Smiling, Matt withdrew and leaned back. Abby was at his belt again, and this time he allowed her to unfasten it and unzip his jeans. Her hands pulled out his erection and shifted straight away to take it in her mouth. She swirled her tongue over the glistening tip, tasting him before she curled her lips around him sucking in the first inch or so. Her hand stroked up and down the increasingly hard shaft, matching the movement of her mouth as she took him in further. Matt groaned appreciatively, grabbing a handful of her hair and urging her to take even more. Soon, he was at the back of her throat and Abby had to briefly pull back to prevent her gag reflex kicking in. Matt was breathing hard now, fighting his release as long as possible. He grabbed Abby's head with both hands, holding her as he pushed in further. She sucked him hungrily and then with a loud moan his hips jerked and he exploded into her mouth.

"Jesus, Abby! That's damn good! Don't stop!"

She had no intention of stopping, not whilst he was still hard and spurting into her throat. She swallowed everything he gave, gasping for air but relishing the taste of him. When he had no more, he withdrew his softened cock from her mouth and pulled her to him, replacing his cock with his tongue. Their tongues tangled together in a dance of passion whilst Matt wriggled out of his jeans completely so that they were both now naked.

"I didn't think you'd actually go for this," Matt breathed, kissing her hungrily and caressing her breasts. "This is even better than I imagined. You're just... amazing!"

"I can't believe I'm doing this either, but I'm so glad I went for it!"

They fell back onto the bed, and Matt straddled her with his back to her face. He urged her thighs apart with his hands, caressing them and kissing the soft skin. The tip of his tongue traced a line towards her wet core and pushed inside, his fingers parting her folds so that he could thrust in even further. Abby's hips rolled into his movements as his tongue fucked her, and she could feel the fire in her groin beginning to rage.

He shifted so that his cock was pushed against her mouth, and Abby had no hesitation in taking it again. It swelled in her mouth as she practically devoured him, determined to get him rock hard again for her. The air was filled with the sounds of satisfied sighs and suckling; both being pleasured and giving pleasure. Abby felt her back arch and she recognised the feeling inside that meant she was close to orgasm again. Matt sensed it too, and increased the force of his thrusting tongue. He circled her clit with both his thumbs and that was enough to ignite the intense wave of pleasure that swept through her. Her body shook and she gasped for air, sucking his now fully erect cock as hard as she could.

Matt broke away and pulled Abby to the edge of the bed. He stood between her legs, looking down at her with dark, lust-filled eyes. The tip of his cock pressed at her slick entrance, and Abby whimpered. "I want you!" she managed to rasp, reaching for his hand. He laughed, and grabbed both her legs as he thrust into her hard. "Fuck!" Abby groaned, and her body shuddered. He thrust again with such a force she had to grasp the bed to anchor herself. He stilled himself, buried deep inside her and she felt her internal muscles clamping around him, adjusting to his size. He stretched and filled her to her limit, almost to a point where it hurt, but that would only add to the pleasure she knew he was about to give.

He began to fuck her with hard, deep strokes; holding onto her hips for leverage. Abby wrapped her legs around him, drawing him in even more. Their bodies slapped together and both moaned and gasped. He varied his pace; sometimes fast and hard, sometimes slow and deep, and then he used his thumbs to circle her sensitive clit again. Every nerve and muscle in Abby's body was tingling with arousal and the fire emanating from her groin was threatening to overwhelm her.

She came violently, her body shaking and rolling uncontrollably and she almost screamed out. Matt sank himself down onto her, crushing her body beneath his but still pounding into her. Their mouths met in a deep, passionate kiss and Matt grasped her breasts hard before rolling over again so that Abby was on top of him.

The change in position gave Abby a brief moment to recover. She sank down onto him, meeting his upward thrust. The tip of his cock hit her womb, and Abby let out the scream she'd previously repressed – he really had meant it when he said he'd make her come numerous times. Moving in perfect unison, their bodies ground together, fucking deeper than before with Abby setting the pace. Her head was spinning and she knew she wouldn't be in control for much longer, but she desperately wanted to hold back her final release until Matt was there too.

He moved his hands to her hips, pulling her down onto him as his thrusting became more erratic and urgent. Abby's soft cries were urging him; the sound of her pleasure driving him wild with lust. He knew he had found a spot inside her that was very sensitive and he deliberately pounded it each time he entered her. Finally, he could hold back no more and his hips jerked, releasing his seed into her a second time with a loud, guttural moan. He rolled them over again, continuing his thrusts as he filled her, breathing her name whilst she sobbed and gripped his body. Suddenly she went limp, her orgasm completely overwhelming her and she could only ride out these amazing moments with Matt in control.

They came down from their high slowly, tongues tangling together and soft caresses saying everything. Finally, Matt broke their union and pulled Abby to his chest. Both were exhausted and drifted into a content sleep within a few minutes.

-o-

They awoke about an hour or so later. The clock at the side of the bed told them it was late afternoon and there was still no real rush for Abby to leave. The heady scent of sex hung in the air, and Abby breathed it in, holding on to the memory of what they had done. If she got out of the bed now, it would break the spell, and she wasn't sure she was ready for that yet.

"If you want to take a shower before you leave, there's a clean towel in the bathroom," Matt said softly.

A shower was probably a good idea; she could hardly arrive home sweaty and flushed. She took Matt's suggestion as her cue to make a move; he was bringing it to an end. Reluctantly, she got out of the bed and padded across the room. "Bathroom's at the end of the corridor," Matt told her. She nodded and forced a smile.

The warm water was refreshing, and Abby felt invigorated by the powerful jet from the shower. Her skin tingled, but she supposed part of that was down to still feeling aroused. There was no denying that Matt was an amazing lover, and although she'd come here with the intention of getting it out of her system; the afternoon had had the opposite effect. She had to find other opportunities to be with him now; this was not going to be the last time she had sex with him.

"Thought you might need help soaping your back!" Matt was behind her, his erection pressing into the small of her back and his hands reaching around to cup her breasts. She turned her head and he captured her mouth in a hungry, desperate kiss. It seemed he was just as reluctant as she was to end it. One of his hands slid down to her pussy and his fingers entered her; Abby reached around and grasped his cock and they pressed against each other, sighing softly. "There's just one thing I said I'd do to you that we haven't done yet; I'm not letting you leave until we've at least tried," Matt breathed.

Abby racked her brains trying to think what it was. She went through his text messages one by one, and then realised what he meant. The thought alone made her knees shake. She'd always been curious about anal sex, but she'd never found a lover confident enough to try it with her – until now. Matt's hand was sliding between the crease in her ass, and she shivered. He pushed his fingertip into her and Abby gasped. "Is this OK?" he whispered, pushing against the tight muscle inside.

"Mm!" Abby whimpered. "I want this!"

He pushed his finger in deeper, and Abby gasped at this strange sensation. When he slid a second finger in, he nipped at her earlobe and cupped her breast with his free hand. Abby pushed back against him, her back pressed firmly on his strong chest. As she relaxed, his fingers pushed in and out of her ass, making her body tremble. She'd never expected this to feel so good. "Ready?" Matt rasped into her ear.

"Yes, fuck me!"

She placed her hand on the tiled wall to steady herself, and Matt slid his arm around her waist. He removed his fingers and replaced them with the tip of his cock, pushing gently at first. Slowly, his cock slid into her ass, deeper and deeper until it was completely buried inside. He allowed Abby a moment or two to adjust and then he began to slowly move in and out.

Abby whimpered; she'd never experienced anything like this before and it felt bloody good! Matt sensed her growing confidence, so he increased his pace. "You're so tight!" he growled, "So sexy!"

"Harder!" Abby demanded.

Matt obliged, thrusting in so hard she fell against the wall. He continued to pound into her, enjoying the screams she was making. Abby braced herself against the cold tiles, moving with him. He bit down on her shoulder as his thrusting became more erratic, and he slid his free hand down between her legs to pinch her clit. She screamed out as her body began to shake violently, then she sobbed; the orgasm sweeping through her like a tidal wave and making her legs buckle underneath her.

"Abby! Oh god yesss!" Matt moaned out, releasing yet again into her. They both slumped against the tiled wall, exhausted and breathing hard. Abby recovered first and turned around to face him, pulling him into a kiss. The water from the shower flowed over their satiated bodies whilst their tongues tangled together and their limbs entwined. Neither wanted to break this spell, but eventually reality set in.

"I should get you home," Matt whispered. Abby simply nodded, she couldn't find her voice. They stepped out of the shower and dried themselves in silence. Minutes later, they were dressed and Matt was driving Abby home.

When they pulled up outside the apartment block where Jess's flat was, they sat for a few moments. Abby hardly dare ask; she knew she wanted more but was afraid he wouldn't. "I think we... I want..."

Matt squeezed her hand. "Me too."

Abby breathed a sigh of relief and got out of the car. She made her way up the stairs to the flat without looking back. By the time she'd reached the door, her phone was beeping to tell her she had a text message. It was from Matt. "We have another appointment at another exotic breeds centre tomorrow afternoon." She smiled, and felt a new spring in her step.