This story starts halfway through the previous instalment, but from Sarah's perspective rather than Amy's. It should read absolutely fine standalone but reading part 5 first would give it the full context. Either way, enjoy.
"Excuse me, but what's going on?"
They both reacted nearly instantly, Amy lurching away from Sarah mid-orgasm, Sarah rolling off to the side, but Sarah new right away that they were busted. She recognised James from the dinner the three of them had shared a few months before and, as her mind refocused from what her and Amy had just been doing, she realised that it couldn't realistically have been anyone else.
Perhaps unsurprisingly James barely paid any attention to Sarah, his focus entirely on Amy who was now kneeling on the bed, still naked, looking at him with an unfathomable expression on her face. Amy was out of breath from her interrupted orgasm, and her body still showed the signs, whether it was the flushed and sweaty upper chest and neck, the slight shudder that ran through her making her close her eyes momentarily, or the tell-tale glistening between her legs.
Oh my god she looks hot right now, thought Sarah, before quickly reminding herself that it wasn't the time to be thinking thoughts like that. This was a situation that could turn bad, and quickly. She realised that while her instinct was to get out of there as quickly as she could, even more important was making sure that Amy was safe first. She was sure that James was a complete gentleman but the sight of his girlfriend naked, being pleasured by another woman, well... you never know how people will react to something like that.
"You're not supposed to be here," came out of Amy's mouth, and Sarah could see that Amy regretted her choice of words the moment she said it. Amy was flustered and Sarah knew that Amy needed to keep calm, but there was nothing that Sarah could do to tell her that.
"Clearly," came James' reply. "I think we need to talk."
Sarah suddenly became aware of her own nudity but realised that there was nothing she could do in the short term. She had no clothes anywhere to hand, they were all spread across the living room wherever Amy had discarded them earlier, other than her boots in the doorway which weren't much use on their own. And the only cover was on the bed, which would be a weirdly passive aggressive move when she'd just been caught having sex with Amy in the bed that Amy normally shared with James. So... she just sat up, using her hands to protect her modesty as best she could, praying that there would be a way to get dressed soon.
James and Amy stared at each other for a few moments longer, something unspoken passing between them, and then James stalked out of the room.
Sarah watched Amy jump into action, Amy throwing on some of her clothes that were lying around, and as Amy started to hurry out of the room to follow James, Sarah whispered, "My clothes?"
Amy stopped and looked at Sarah, seeming to have almost forgotten that Sarah was there, and replied finally, "Of course, wait here," before she left the room, closing the bedroom door behind her.
Sarah lay back on the bed, her mind spinning. In the space of a few minutes she'd gone from breaking every rule that she'd ever made for herself when it came to her mentees, her and Amy's lunch turning into something much, much more, to being the spare wheel in what she suspected might be a very difficult afternoon between Amy and James.
Amy interrupted Sarah's thoughts by coming back into the room and closing the door quietly, handing Sarah her clothes. Sarah quickly pulled them on, knowing Amy would want her gone quickly, but when she was dressed, she stopped to ask in a whisper, "Are you going to be ok?"
"I think so," Amy whispered back. To Sarah she looked worried, understandably. "I mean... he won't be nasty to me if that's what you mean but... I don't know if me and him will be ok."
Sarah wanted nothing more than to reassure Amy, but she realised that a hug or a kiss would not be a good idea in that moment, both in case James saw but also in case Amy rejected the gesture. Instead, Sarah held out a comforting hand which Amy took. "If you need anything, you can call me, ok?"
"Thanks."
Sarah smiled as sympathetically as she could, and then Amy showed her to the door, all while James watched them both. Amy stood looking at Sarah as Sarah stood out in the hallway, but as Sarah opened her mouth to say something more the door slammed shut and Sarah was left outside the front door, alone.
Sarah hurried out of Amy's building, but when she got outside, a safe distance away, she turned down a short side street, leaned back against the wall, and took a deep breath with her eyes closed. What on earth had just happened?
Factually, intellectually, of course she knew. Her lunch with Amy had led her to the realisation that she didn't just like Amy, she really, really liked Amy. Really liked her. And it seemed as if Amy felt the same. What they'd just done had been intensely intimate and emotional, entirely different to the sex they'd had until now.
The trouble was though that it wasn't supposed to happen like that. Sarah had her small group of female, nominally straight (at least at first) mentees and the deal was simple - Sarah would help their careers a great deal, and in return they would help her out in other ways. That was how it worked, and it worked well. No emotional attachment. Purely transactional. Sarah the dominant personality and dominant in bed. Simple.
With Amy though, Sarah hadn't just pushed against the usual boundaries, she'd crashed through them leaving them in tatters. First, she'd allowed Amy to take on the dominant role in their relationship, something that had never happened before. No, allowed wasn't the right word, Sarah reflected. Asked. Pleaded. Begged.
Giving herself to Amy in that hotel room in LA had been a life changing experience. The memory of being cuffed and tied, fucked repeatedly, used, it made Sarah's heart race just thinking about it. And when Amy had taken charge and won the battle of wills the next time they saw each other back in London, Sarah finding herself bent over and spanked on her naked ass while Amy teased her with her fingers in a meeting room of all places, Sarah had known that the roles between them could never be reversed again. She may still be the dominant partner with her other mentees, but with Amy Sarah knew that she was now the submissive partner.
But then, having submitted so completely, Amy had stunned her by not forcing that role. Later on the same night that Amy had spanked her over a meeting room table and then fucked Sarah all over Sarah's flat, her and Amy had sat up talking and drinking, before her interest in the more emotionally engaged sex that Amy had had with Luisa, her lesbian fling in LA, had led them to make passionate love for the rest of the night. No dominance. No submission. Just Sarah and Amy exploring each other's bodies. It had been great.