We wasted no time in taking each other’s clothes off before I led my boyfriend and my swimming buddy to the bedroom. I was more than ready to help out with whatever they wanted to do together.

Now I was holding Aidan’s penis in one hand, checking the condom was rolled right down to the base. He was on top of Matt, whose vagina I was holding open with the other hand. Just as I was preparing to guide Aidan inside, I hesitated. I was abruptly hit by the enormity of what was about to happen.

I knew rationally that Matt had given me assurances, but I felt compelled to stop and ask again. ‘Is it definitely safe? You know, all this?’

‘It’s safe,’ said Matt. ‘No nasty diseases, no chance of breeding. Do you want to stop this and I’ll show you all my medical notes?’

While it wasn’t like him to be sarcastic, I couldn’t figure out whether he was being serious. ‘No,’ I said, deciding to take his word, ‘let’s continue.’ I tugged Aidan’s penis slightly forward and he moved his body, slipping fluidly into Matt. Both of them sighed in pleasure.

I removed my hands to give them room for the in-and-out motion. Beyond that, I didn’t know what to do. Because Matt was into men only, both of us had focussed on him, but what was the etiquette for watching someone else have sex? I also didn’t want to distract Aidan by touching him too much, so I sat back on the bed and found a good place to watch the strokes happen.

Perhaps because I was watching from a different angle, his penis somehow managed to look longer, thicker and harder than I’d ever seen it. Matt was stroking himself at the same time. I was turned on and ready to burst, but I refrained from touching myself. I wanted to savour the view.

Just then, we heard two urgent presses on the buzzer. Aidan didn’t stop what he was doing. ‘Ignore it,’ he said.

‘What if it’s important?’ I asked.

‘It’s not. When people don’t get an answer from whoever they want, they press all the buttons until they do.’

‘That’s annoying.’

‘You can’t even switch it off. They’ll go away.’ He still hadn’t stopped thrusting into Matt.

‘I’ll go and deal with it.'

‘Don’t bother. Anyway, I’m nearly there.’

‘And you don’t want to miss that,’ added Matt. They kissed again, as they loved to do.

A few seconds later, it sounded twice more, one buzz after the other.

‘No,’ I said, ‘It sounds like it’s for you. Just stop for two minutes and I’ll get rid of them.’

Aidan reluctantly stopped thrusting as I picked up the speakerphone in the hallway. ‘Who are you looking for?’

‘Parcel,’ said the voice.

'Which flat?'

'Um... first floor left.'

‘Oh. Wait a moment.’ Holding the speakerphone away from me, I shouted through to the bedroom. ‘Parcel for your place, apparently.’

‘There shouldn’t be,’ the boys pulled apart. ‘Buzz them up and let’s see.’

I borrowed a dressing gown and dealt with the interruption. The delivery man quickly handed me a small shoebox-sized parcel, then hurried back to his van.

When I returned to the bedroom with the small box, both boys were standing beside the bed. Aidan’s erection had started to subside. ‘Oh no,’ he said. ‘You weren’t supposed to see that. It’s supposed to be click-and-collect because things have a habit of going missing in this block.

‘Is it for me?’ I’d already clocked the Sandra Springs logo on the side and had my suspicions.

‘For your birthday. It’s only a couple of weeks off now, isn’t it?’

‘I see. Then hide it away and I’ll pretend I haven’t seen it.’ Aidan took the parcel and placed it under the bed. ‘All right. We need to set you boys up again.’

Aidan was still wearing the condom. I took it off for the moment and grabbed a new one, but didn’t yet open it. We lay down in such a way that he could rub my clit with one hand and Matt’s penis with the other, while we could still access Aidan’s half-erection. My swimming buddy and I ran our tongues up and down the sides of it, often making eye contact with each other, and taking turns to place the head in our mouths.

It wasn’t long before he was hard and ready to go again.

‘I wondered…’ started Matt. We waited a moment for him to finish.

‘What is it?’ I asked.

‘You don’t have to, but I wondered… would it be possible to go on top this time?

My boyfriend was openly bisexual and he'd told me about the frustrations of ending up as the bottom in all-male relationships when all he wanted to do was top for once. So to my surprise, he said without hesitation, ‘Of course it would.'

They swapped positions and I continued – as best as I could – to keep stroking Aidan’s erection gently. ‘Thanks for this,’ said Matt.

‘Do you want me to guide him in again?’ I asked.

‘That would be great.’

As I was about to open the new condom, I stopped to ask, ‘Do we really need this? I mean, you’re both clean and Matt can’t get pregnant.’

Both of them looked at me, then at each other, then back again.

‘Er,’ said Matt, ‘if you’re happy with that, and if Aidan is?’

I could tell Aidan was trying not to sound overexcited. ‘If you’re happy with it, that would be good.’

‘All right, then.’ I put the condom aside, unopened, grasped Aidan’s bare penis and guided Matt into position, opening his vagina slightly with the other hand. He found his mark in one go, landing squarely on Aidan. I heard a faint wet sound as they moved together.

Now came the awkward time again when I didn’t know what to do with myself while watching the sex. I again didn’t want to distract Aidan, but I still decided not to touch myself yet.

Regardless, the two looked like they were having a lot of fun. I was impressed with Matt’s technique as he was able to keep up the bouncing motion in a way I simply couldn’t, and not just because my boobs jiggled too much. I could tell he was about to orgasm as well.

Although Aidan didn’t say anything, I suspected he was close because he had a habit of holding his breath when it was about to happen, something he hadn’t realised until I pointed it out.

Matt let out an, ‘Oh!’ when he felt my boyfriend finish. Then I remembered – and I don’t know how I’d forgotten – nothing was separating their genitals at that point. My boyfriend had exploded inside one of my best friends, and I was so excited about it.

I waited a few seconds for them to pull apart and reveal the mess. Exploded was the right word, as the first few drips fell out of Matt onto Aidan, followed by larger blobs.

I can only blame enthusiasm for what I did next, as I leaned forward and licked up some of the semen from Aidan’s body, then moved to take the rest of it from Matt’s vagina.

As I swallowed, I thought about what I’d done. It was the first time we’d ever interacted sexually and I hadn’t even talked to him about it first. ‘Um, I’m, er… I should have asked first. I’m sorry.’

‘It’s all right,’ he said. ‘Keep going. It feels nice, actually.’

‘You sure?’

‘Yes, keep going. Take as much as you want.’

'Do you want me to give you any?'

'No thanks. You deserve a treat.'

He dripped the rest onto Aidan’s body. I alternated between licking it up from there and using my tongue to scoop the rest from his vagina, which he held open for me.

Once I’d taken and swallowed as much semen as I could reasonably manage, I moved away again. ‘If you do that again, boys, then I want to clean up again. That was incredible: boyfriend, best friend, nothing between you. That was incredible,’ I repeated.

‘Though we still need to clean up,’ said Matt.

‘Yes. Yes, of course.’

I jumped off the bed to find a towel, Aidan added, ‘While you’re up, you might as well open that parcel.’

‘Don’t worry, I can wait a few weeks. I can’t believe how prepared you are. Most men don’t think about it until about two days before, if they even remember.’

‘Amen, sister,’ Matt interjected. He was now lying beside Aidan, cuddling him.

‘Well, it’s not everything. These are just little extras.’

‘Let me grab a towel, then I’ll open it.’

Once all fluids were cleaned up, I carefully opened the box. It was exactly what I’d expected and feared: red lingerie. Aidan wasn’t typically unimaginative, but that was very much the default present of every boyfriend who doesn’t know what to buy his woman. Not only was it not my colour, but there was little in the way of the bust support I really needed. The best I could say is that it fitted me snugly.

I picked up the excessive paper packaging and stuffed it back into the box. ‘Was there anything else in there?’ asked Aidan. ‘There should be one more thing.’

‘I don’t remember seeing anything. I’ll check again.’

I picked through all the paper, taking it out of the box again. The final piece seemed to be wrapped tightly around something hard. With a little brute force, I ripped open the paper and a heavy plastic lemon fell out.

I looked at it for a few seconds. ‘How does this work?’

Before Aidan could answer properly, Matt spoke over him. ‘That’s a Lady Lemon. It’s a suction toy, so it’s like a BJ on your clit. You'll love it. I used to have one, but I’m too big now. Don’t mean to brag and all that.’

That was a lot more thoughtful of Aidan. I looked around the toy and spotted a small hole in the tip of the lemon. ‘So that’s where you put it on you?’

‘That’s right.’

‘Gosh, what will they think of next? They should make a Man Lemon to fit you, Matt.’

‘Do you want to try it now? Take off your new underwear and come and join us.’ He scooted over on the bed to let me between them both. ‘Come to think of it, have you had an orgasm today?’

Technically, I had one earlier that day with the schoolboy. I would need to mention this at some point. So as not to ruin the moment or lie to them, I said, ‘I was just enjoying watching you both.’

‘Aidan, bad boy, not making sure your lady friend had her fun.’

‘You’re a bad boy,’ he replied, reaching over me and playfully slapping his wrist. They leaned over me and quickly kissed again.

‘So the least you can do is make it up to her now. Go on, place it gently on her clit and turn the stem to control the suction.’

'Just before you do,' I had to ask, ‘You said this was only a bit extra. What else were you thinking of getting? For my birthday, I mean?’

‘You really want to know now? You don’t want to save it for nearer the time?’

‘Is it a free pass to sleep with another guy?’ I blurted it out before I thought about what I’d said.

‘Um…’ he started, ‘it… it wasn’t that, no.’

‘It would only be fair, though,’ Matt piped up. ‘All things considered.’

I tried to walk it back. ‘I was joking.’

‘I think you both should discuss it. I know I had fun with your really cute boyfriend. Thanks so much for being a good sport.’ He patted me roughly on the shoulder like a coach congratulating a star striker.

Still audibly flustered, Aiden said, ‘I was going to ask if you were free to go wild swimming, maybe go up to Scotland, to Loch… Loch… I can’t remember its name. It was something like morbid.’

‘Loch Morlich? Oh my God, I’ve wanted to go there forever. Seriously, you would come? I know you’re much less into swimming than me and Matt.’

‘I would come and give it a shot. It would be fun to try.’

‘Thank you so much.’ I kissed him on the lips.

‘Now,’ said Matt, switching on the Lady Lemon, ‘I think we need to give this girl an orgasm or two.’