Thanks for reviews! This chapter follows straight on from the end of chapter 3.
As she heard the factory door slamming behind Michelle, Carla was still laughing. Despite Peter's furious glare at her, she just couldn't help herself.
The situation was so ridiculous, as they lay naked on her office desk, his body still over hers. And Michelle had seen it all.
With an effort, Carla finally suppressed her giggles. But she felt light-headed, her body tingling with amusement, with the shock of their discovery, with the interruption to their pleasure.
"What?" she asked, as he moodily lifted his body up, moving away from her.
But as he sat down on the side of the desk, she couldn't help noticing the embarrassment hadn't affected his libido.
"How can you find this funny?" he asked, his voice outraged. "She saw us…." He trailed off into silence, overcome again by shame.
Carla smiled, slightly uncomfortably. She thought back to the exact moment she'd become aware of Michelle's presence. And uneasily, guiltily, she admitted to herself the thrill she'd felt in that moment at the sight of her. The thrill she realised she still felt, as her body tingled, throbbed.
She reached out to Peter, stroking her hand down his thigh, loving the sight of his stiff cock, so hard and so tempting. God she wanted him again. But her desire felt more than just sexual.
For the first time, she let herself remember the deep pleasure she'd felt in those first few seconds. The way every sensation felt intensified in the moments Peter had carried on making love to her, while Michelle was watching. His cock had rarely felt so good inside her, his kisses so erotic, every movement even more sensual for being watched.
It was probably best not to mention that to Peter though.
"She might've been watchin' for ages…" he said, his brow furrowing in distress.
"She weren't" Carla lied quickly. "She just got here."
She wasn't sure why she was covering up for her sister-in-law. But she'd seen something in Michelle's eyes that both puzzled and appealed to her.
Quickly she tried to change the subject, hoping to distract herself from uncomfortable memories, from inconvenient longings.
"Come on baby.." she said, playfully lifting his chin up and kissing him. "Didn't you see her face?"
"Damn right I did.." Peter shot back. "But she saw a lot more of me."
Carla laughed, stroking his face tenderly as she caught his eye.
"Nowt she'd not seen before though, hey?"
He flinched.
"That's even worse."
A rush of impatience hit her. All this talking was just wasting time. The candles were still burning, the mood could still be romantic, if he'd just get over himself.
She let her eyes run down his body, unashamedly lusting after him, suddenly not prepared to wait any longer.
"Look darlin'. We're all adults aren't we?" She fixed his gaze. "You've had her. I've had her brothers…"
He looked at her, a flicker of amusement appearing on his face.
"Bit late to get precious about it now, isn't it..." she said, trying to tease a smile out of him.
And as he finally laughed, she seized her moment.
Catching him off-guard, she pulled him down on top of her again. He didn't put up much resistance, positioning himself over her, his arms by her side as she drew him into a passionate kiss.
"If anythin' she were jealous…" Carla said slowly, breaking away from his lips for a moment, lightly trailing her hand down the small of his back.
"Jealous?" He looked concerned.
"Of how good we are at it." she grinned, her eyes flashing wickedly.
She wriggled underneath him, lust in every movement she made, desperate to carry on where they'd left off.
Impatiently she grabbed his hips, drawing him towards her. Then she groaned as she felt him sliding into her again, his cock blissfully hard, his movements powerful.
She let her head fall back against the desk, savouring how good he felt inside her.
"We are good aren't we." he whispered, kissing her softly.
"Remind me again.." she teased, grinding her hips against him, smiling as he began to move, filling her again and again, his body pounding against her, his hard thrusts contrasting with his light tender kisses.
But quickly she discovered the problem, as she found her eyes drifting back to the doorway and her mind straying.
Although she knew they were no longer being watched, she could still visualise Michelle's eyes on her. Images formed in her mind, so vivid, so erotic. How it might look as her body arched towards him, eagerly welcoming his cock, his lips pressing down on her neck, their bodies moving together again and again.
She felt no self-consciousness, just intense pleasure: pleasure that flooded her body and her mind until she could hardly think straight.
Within seconds she was far too aroused, her nerve-ends sensitised, tender. Every touch of Peter's made her tremble with delight, every thrust inside her drove her wild. She heard herself moaning, and she couldn't seem to do anything to stop herself.
Desperately she clung to him, the sensations intoxicating, already threatening to overwhelm her. She realised she couldn't last much longer before she came. And she knew how suspicious that would make him.
She had to distance herself from it all. The gentle weight of his body over her, his passionate kisses, the memories of what had just happened.
To try to take her mind off it, to delay her orgasm, she thought back to when he'd arrived at the factory earlier in the evening.
She couldn't deny that even back then she'd been in a very strange mood.
So the next chapter will be the final one - starting with the flashback of earlier that evening.