The first part of this chapter is M Rated - please skip if you like to the T part

*************RATED M *************************

Kate found herself pushed up against one wall as they kissed each other hungrily. She reached for Steve's shirt and yanked it free of his trousers before undoing the buttons and removing it from his body.

Steve reciprocated and divested Kate of her jumper before removing her bra. As soon as her breasts were free he was sucking on them. Rolling the nipple around with his tongue before nipping at the hardened tips.

Kate bit down on her lip. Mark barely paid much attention to this part of her body apart from the odd squeeze, and she was just content to let Steve do his thing. Moaning or sighing to let him know whether she was liking what he did or not.

Fuck, she wanted him. Reaching for Steve's trousers she undid the fly before reaching under his underpants and cupping him gently. He was semi erect and Kate gently stroked him, assessing his girth and size with her hand, comparing him favourably to her husband. She felt Steve thrust against her hand as he hissed at her touch.

"Careful," he warned her. It had been a while since he had had sex and the last thing he wanted to do was ejaculate in to her hand because he had got too excited. He needed things to progress and quickly.

Kate felt Steve undo her trousers and yank them down her legs. She stepped out of them leaving her in just her underpants.

Before Steve let Kate remove his trousers, he reached around to his back pocket where his wallet was. He quickly removed it, opened the wallet and took out the condom packet he always kept on him before tossing it on the floor. His trousers were soon like Kate's in a puddle in the floor.

Looking at each other, they both removed their own underpants and took time to admire the other's naked form.

Steve had a small patch of hair on his chest, less than Mark had. There was a small trail of hair that led from his belly button toward his crotch. His erect penis stood proud next to his testicles that hung between his legs. He was a decent size and unlike Mark was circumcised.

Kate felt a little self conscious as she felt Steve's eyes raking over her figure. No one apart from Mark had seen her naked for a while. Her body showed tell tale signs that she had had a child. "Have you slept with someone who's had a child before?" she asked interested.

Steve shook his head.

She saw Steve looking at her breasts and felt she should say something. "They've lost a little of their pertness since I was pregnant," she said, repeating what Mark often told her. "And I've got some stretch marks," she added, pointing out more flaws that Mark regularly noticed and commented on.

"Stop being so negative about your body," Steve said. "I think you look pretty amazing," he said before taking her in an embrace and kissing her.

He led her to the bed where they climbed on top of the covers. Steve kneeled and pulled Kate on to his lap where he restarted his oral exploration of her breasts.

Kate wrapped her arms around Steve's shoulders as she ground herself on his lap in time with his licks and flicks. She soon felt Steve penetrate her with a finger. It was soon joined by a second.

"Oh god," she moaned as he started to move his hand. Kate felt herself start to ride his fingers. She rested her head on Steve's shoulder as he continued to explore her depths, occasionally pulling out to explore her sensitive bud before plundering her depths again. She could feel her arousal was slick over his fingers. Kate felt her orgasm approaching. It was the first brought on by someone else in quite a while. Fearing she would explode, she grabbed Steve and kissed him as she came. Steve felt her pulsing around his fingers as she did so.

When it was over she felt herself relax, panting heavily as she fought to gain her breath. That had been amazing. So much better than anything with her husband. She smiled coyly at Steve who returned the grin before lazily taking Kate's lips for another lazy kiss.

Gently he laid Kate down so she was on her back on the mattress, her thighs parted to cradle his body as he lay on top of her. She felt amazing beneath him as he ground his pelvis against hers reflexively, letting her know exactly what he wanted.

He pulled back and quickly sheathed himself in the contraception before resuming his previous position. "You're sure?" he asked as he placed his mushroom shaped head at her warm entrance.

Kate nodded. She knew she was breaking her vows to Mark but after the way he'd been treating her it didn't feel as wrong as she thought it would.

Steve kissed her as he slowly entered her. He felt different to Mark, thicker, she thought as she felt him stretch her open. Eventually he came to a stop when he was completely inside her velvet heat. "You feel so good," he told his partner.

"Thanks," Kate replied, not used to talk let alone compliments during sex. "So do you," she returned the praise.

Slowly Steve started rocking his hips so he moved in and out of her body. Kate lay there getting accustomed to the push and pull of Steve's body against hers as he did so. Her hips gradually learnt Steve's rhythm and matched his in tempo mirrored movements.

Facing Steve felt much more intimate than being entered from behind like Mark favoured. Despite being on top of Kate, it felt like they were making love as equals not one trying to assume dominance over the other.

"Do you trust me Kate?" Steve asked as he continued to rock against her. She nodded before she slowly felt her thighs being lifted towards her chest and her calves coming to rest on Steve's shoulders.

Kate had never had sex in this position before but was soon a convert. With every thrust of Steve's hips he was brushing against her g-spot which aroused her like never before. She was never usually very vocal during sex with Mark but couldn't help the moans and groans that escaped her lips with every single thrust of Steve's hips encouraging him on.

"Fuck, you're so tight," Steve informed Kate as he felt her grip him strongly with her inner muscles as she approached her climax.

"Sorry," Kate said thinking she was doing something wrong. She was never usually praised during sex.

"No. It's amazing," Steve replied as he picked up speed, feeling his orgasm approach.

With a shout the new lovers finally came together. Kate just beating Steve to it but tipping him over the edge as she did so.

**************** RATED T **************************

"You ok?" Steve asked Kate a little while later. They were now lying together in bed, the cotton sheets loosely covering their naked bodies. Kate had her head resting on his shoulder as she stared at the ceiling above her. She had been fairly quiet since he had withdrawn from her body, and Steve wondered if she regretted their intimate moment.

"I don't know," Kate replied. Now that her passion had dimmed she was confused. "I've just committed adultery. I'm not quite sure how I'm supposed to feel,".

"You want me to go?" Steve asked. Kate shook her head. "Ok," he said before silence reigned in the room.

"I thought I would feel more guilty than this, but I don't," Kate admitted eventually. Sex with Steve had been more loving and intimate than anything she had ever experienced. She was fairly sure she had just made love for the first time. Why didn't she feel this way after sleeping with her husband? "Does that make me a bad person?".

"No," Steve replied. "No worse than me. I've just slept with a married woman," he reminded her. It was his first time at committing adultery as well.

Kate shuffled on to her side, facing Steve as her hand propped her head up. "Sorry," she apologised.

"Why? I'm not!" he said as he turned to mirror her position, the bed sheet falling to their waists with all their movement. Steve reached out and ran a finger gently up Kate's side, tracing the outline of her hip and the dip of her waist, leaving goose pimples in his wake. "I've wanted to do that since I saw you walking past me in that police station corridor," he confessed.

"And now you've had me?".

"I'd like to have you again," he replied. Kate sighed. It was a big step to take. One time she might be able to pass off as an honest mistake which Mark might forgive. Two times would be something different- an affair. The end of her marriage to Mark if he ever found out. "I understand if you can't," Steve said, recognising her hesitancy.

"It's not that I don't want to," Kate informed him.

"I know,".

"It's just...Josh," Kate continued. Right now she didn't care if she did separate from Mark. It was what would happen with Josh if she went ahead with it. She didn't know how she would cope if Mark prevented her access to her son. "My parents separating had a life long effect on me," Kate admitted. "I don't want that for him,".

"Kate, I get it," he reiterated.

"Thanks,".

"But surely staying together in a loveless marriage won't be good for Josh either?" He pointed out.

Kate stayed silent. Maybe Steve had a point.

"I should probably go," Steve said as he sat up, thinking he might have said too much. He wasn't going to lie. He was upset that Kate had turned him down but understood her reasons. It was going to be so hard to go back to being just friends now that he knew how her body felt and moved against his.

"You don't have to," Kate said.

"I know," Steve said as he tenderly cupped her face. "But I should before we do something we regret,".