Unexpected Adventure

— Damn it, Yul, how many times have I told you already!

— I'm sorry, please, Yan, I didn't mean to…

— How is this even possible? A thermostat and a refrigerator look completely different, how could you mix them up?!

pacing around the room among the equipment and stands with test tubes, clearly annoyed by something.

— Do you understand it's not just about my PhD? I borrowed these samples temporarily, under written responsibility, I have to return them. There's an inspection tomorrow, what am I going to show them…

Intern Yulia was about to burst into tears. Shiny teardrops welled up in the corners of her large green eyes. As already mentioned, she had accidentally placed an entire stand with sperm samples into the thermostat instead of the freezer, which, naturally, rendered them completely unusable for research. The girl had been doing her internship at this center for two weeks now, and in that time, due to inattention or nervousness, she had already managed to mess up a few times, but never this seriously.

For this reason, the second girl, PhD student Yana, to whom Olya had been assigned, was simply furious. The research on today's samples was supposed to be the finishing touch for her doctoral dissertation, and now all the work would likely have to be redone. Angrily pulling her open lab coat, worn over a short dress (she had plans to go to a club with friends after work), she turned once more to her careless charge to unleash another angry tirade at her. But she stopped mid-sentence: the girl looked so frightened and confused, she was crying and seemed about to break down completely.

— Okay, that's enough. — Yana said in a conciliatory tone. — Don't be upset, what's done is done. Let's go get some coffee or something.

She walked over to Yulia, hugged her, stroking her back to calm her down. She helped her up from the chair and led her to a small break room where they could have some tea. She turned on the kettle and poured coffee into mugs for both of them.

— Take off your lab coat, you'll get it dirty. We're not working anymore today anyway.

Yulia obediently unbuttoned her lab coat, took it off, and hung it on a hook. Underneath, she was wearing a thin tank top, a short striped skirt, and high-heeled shoes.

— Hmm… were you planning to go somewhere today? — Yana inquired.

— No, why? — Yulia opened her eyes wide in surprise.

— Well, the short skirt, the heels. Is it really comfortable to come to an internship dressed like that?

In response, the girl just shrugged:

— I always dress like this — her eyes sparkled mischievously. Yana snorted in surprise.

Meanwhile, the kettle boiled, and the girls poured hot water into their mugs. From her stash, Yana pulled out a bottle of cognac and poured a little for herself and her charge. Sipping the hot, aromatic coffee with some bagels found in the cupboard, they gradually calmed down. Yana remembered a few jokes, and the girls even had a laugh. Yulia laughed, threw her head back, and almost fell off her chair, grabbing the edge of the table. Yana managed to notice the glimpse of tiny pink thong panties under the hitched-up skirt and swallowed a sudden rush of saliva. Yulia pulled her skirt down and looked away, blushing. Apparently, the alcohol was having an effect. Yana noticed that she was also stealing interested glances at her. And each of the girls now understood what the other was thinking. Shooing away extraneous thoughts, Yana firmly declared:

— So, Yulek, we need to think about what to do. The commission is supposed to come for an inspection tomorrow, well, I already said that. We'll have to somehow get out of it. Any ideas?

Yulia thought.

— Maybe we could pour something that looks like ejaculate into the test tubes?

— Nah, I thought of that right away. They'll randomly pick a couple of tubes, and under the microscope they'll immediately realize it's not the real thing.

The girls thought, occasionally suggesting options, but nothing sensible came to mind.

— If we were guys, we could have 'made' the samples ourselves — Yulia said regretfully.

Yana thought.

— Mmm… you know, that's an idea. We need to look for a donor. Maybe some acquaintance is still around. We'll fill them in on the problem, ask them. Yana was clearly excited by this idea. — Let's go, quickly, I'm afraid we're the only ones left here.

The girls jumped up and left the lab. The center's corridors were mostly empty and dark: it was already quite late. Despair was growing. Fortunately, there was a light on in the embryology lab. Yana and Yulia rushed there. They sighed with relief upon finding what they were looking for.

In the lab, sitting in front of a computer, was Andrey, a fellow PhD student like Yana, entering something into research protocols. In the corner, Sasha, a student lab assistant, was putting away washed test tubes and pipettes in a cabinet. The guys were clearly running late, apparently also finishing up important work.

— Andryukha! — Yana rushed to him and hugged him. — You're our saviors!

— What?! — Andrey was clearly stunned. You're just sitting there, minding your own business, calmly entering results, and suddenly two girls burst in, and one of them throws herself around your neck. Yana, like Yulia, had forgotten to put her lab coat back on and looked simply stunning: A short red dress emphasized her ample bust and slender waist, her legs in matching red shoes seemed to go on forever. The second girl was vaguely familiar and was no less striking. Slender but with a great ass and shapely legs, in such a short skirt that it seemed one more centimeter and you could see her underwear…

Sanek was also very surprised by the guests. Putting the test tubes aside, he stared at them wide-eyed, especially at Yulia. Then he came closer.

— Andryush, help us out — Yana asked him. She briefly recounted what had happened.

— So that's how it is… — the girl finished.

The guys were taken aback by the request and exchanged glances.

— Okay, let's… — Andrey began.

— Wait, let's discuss something first — the lab assistant said to him.

Sasha called him aside, and they argued about something. The girls watched silently, not interfering, as their fate now depended on the guys. Andrey initially disagreed, but Sasha spoke quickly and nodded towards the girls waiting for their decision, and Andrey, after looking Yana and Yulia over from head to toe once more, apparently agreed with him. The guys returned to the girls, a strange glint appearing in their eyes.

— We agree — Sasha answered for both. — But on one condition.

— You will help us.

— How's that? — Yulia was surprised. Hold the jar for collection or something?

Yana frowned.

— Nope — Sanek grinned. — You'll have to work with your hands… or something else.

— Have you lost your minds? Andrey, Sash, what's wrong with you? — Now it was Yana's turn to look stunned. — Is it so hard for you to jerk off into a jar a few times? And besides, I'm married. — She turned to Yulia, seeking support.

— I… I… well… I have a boyfriend too — Yulia answered haltingly, but somehow without enthusiasm. She turned red as a beet and looked away.

Andrey twitched as if to say something, but Sanya shot him a look, and he said nothing. Then he answered the girls:

— Well, suit yourselves.

An awkward silence hung in the air. Yana wanted to scold the guys or continue trying to persuade them, but suddenly she realized: they wouldn't agree. What to do?

—… Yan… — Yulia said quietly. The girl was hiding her eyes and still looking away. — l-let's… do what they want…

Sasha's eyes lit up, the corners of his mouth turned up into a smile. It seemed even he didn't expect either of the girls to agree. Yana walked over to Yulia.

— Are you serious? — she asked.

— Well, yes, what else can we do… I can do it all myself. It's my fault after all.

Yana thought for a moment. Then she smirked at her own thoughts and said decisively:

— Okay, fine. And then, turning to the waiting guys:

— If a single living soul finds out about this…

— No one will find out! We won't tell anyone! — Sasha and Andrey began simultaneously.

Ten minutes later, the whole group had moved to a large break room with several tables, armchairs, and a large sofa. From the storage room, Sasha brought a screen, dividing the far part of the room in two, while Andrey and Yana brought the jars typically used for ejaculate collection, as well as test tubes and tissues. When everything was ready and the guys and girls gathered in the room, a silent question hung in the air.

— Well… who with whom?… — Yana broke the silence.

— Yul, if you don't mind… — Sasha asked. The girl nodded, blushing again. Then the two of them went to one side of the screen, and Yana and Andrey went behind the other.

Andrey unbuttoned his pants and looked at Yana, grabbing the waistband of his underwear. It was clear he was nervous, though that didn't stop his cock from standing rock hard.

— If you don't want to… — he mumbled. But Yana immediately interrupted:

— Too late, I already agreed. Come on… hero.

The anger at the guys that had filled her just moments ago had somehow evaporated. In its place came an exciting anticipation of something new. The girl surprised herself.

Andrey pulled down his underwear and pants with a sharp motion.

— Wow! — was all Yana could utter. — That's some equipment.

In its 'combat' position, his cock was probably about twenty centimeters.

Yana reached out and touched the head with her fingers. Andrey exhaled, a shiver of excitement running through his shoulders. More confidently now, the girl grasped her colleague's cock, stroking its entire length. Then she squeezed tighter, watching Andrey's reaction. He closed his eyes and seemed to stop breathing. Yana pulled the foreskin back to the head, then to the base. And back. Doing this standing was awkward, so she knelt down. Andrey was about half a head taller than her, so now his cock was literally in front of her face. The girl placed the jar for collecting ejaculate, which she had been holding in her left hand, on the floor and continued jerking Andrey off with both hands.

— What am I doing?… this is cheating on my husband, no matter how you look at it…" Her own thoughts made her blush. Shame over what was happening mixed with growing arousal. The longer she caressed Andrey's cock, the more she got into it, increasing the pace. They made eye contact, Yana was breathing heavily, licking her dry lips, now looking at Andrey with desire, then at his rock-hard tool of desire, inhaling its arousing scent. After a few short minutes, the guy started breathing faster and put a hand on Yana's head. She understood he was about to cum and grabbed the jar, bringing it to the head. She was just in time, but the stream of hot semen was so strong it almost knocked the container out of her hand, and most of it ended up on her face, hair, and neck.

— Oohh! — Andrey groaned, squeezing his eyes shut and gritting his teeth.

The girl began collecting the ejaculate samples from her face with her fingers, wiping them on the rim of the jar, trying to save as much as possible. Fortunately, it was enough for one test tube.

— Sorry, I didn't know it would be like that — Andrey said, seeing the mess. However, the sight of the girl splattered with his sperm pleased him. Inside, arousal began to build again. Yana licked her lips and swallowed: a little semen had gotten into her mouth.

Yana stood up, clutching the precious jar in her hand.

— It's okay, the main thing is we have material. For one test tube.

They made eye contact and smiled weakly at each other. Definitely, a spark had passed between them. Wiping off the remaining sperm, Yana turned towards the screen while Andrey composed himself. Her eyebrows shot up: from behind it came distinct smacking sounds, panting, and muffled male moans.

— I did everything with my hands at first, then I realized it would be awkward that way — Yulia said as if justifying herself. — don't think I'm some kind of…

— You know, that was very sexy — Yana answered her seriously.

— Really? — the intern asked with relief.

— Mhm… now I want to do that too — Yana looked down.

— With Andrey?

— With Andrey… and Sasha…

— Me too… only let them do it to us too?…

— You're reading my mind, Yulek.

The girls exchanged glances, then walked over to the guys sitting on the sofa. While they were talking, Andrey turned off the overhead lights, leaving only a small desk lamp on, plunging the break room into soft semi-darkness.

— Boys, put on some music — Yulia asked. Sasha took out his phone and selected a quiet, melodic track.

Without a word, the girls stood in front of the guys and began to move smoothly in a dance, stroking each other's bodies with their hands and smiling. At this sight, the guys' cocks began to fill with blood again, tenting their pants. Yulia stepped back and continued dancing, climbing onto the coffee table, while Yana turned to Andrey and Sasha.

— Take off your pants. Get undressed completely! — Yana suddenly felt like commanding the guys, and for some reason, she had no doubt they would obey immediately.

Having shed their clothes, the PhD student and the lab assistant sat back down on the sofa, and Yana knelt before them. In each hand, the girl took the hard cock of one of the guys and leaned forward. She tried Andrey first, taking the head and shaft into her mouth, immediately wetting it with saliva and moving her head back and forth. Yana didn't practice blowjobs often, only occasionally indulging her husband this way, but she clearly knew how to do it. Andrey began breathing heavily again, leaning back against the sofa. Sasha placed his palm over Yana's hand, indicating he wanted to increase the pace. And the girl obediently moved her hand faster. Then she took Sasha into her mouth while jerking Andrey off. And then switched again.

Meanwhile, Yulka had freed herself from her tank top, throwing it at Andrey. The guys couldn't take their eyes off the slender young girl undancing for them, while also enjoying Yana's lips and agile tongue. Who would have thought a regular Friday evening would end like this. All thanks to Yulia's inattention!

The culprit of the whole process was meanwhile struggling with the zipper on her skirt. The fastener had jammed at the most inopportune moment, and she had to undress while standing in her heels (which Yulia had no intention of taking off), but finally, the girl managed, and the skirt fell to her feet to approving sighs. She turned around, giving them a