Another quick round.

Helen got to enjoy the feeling of being the one in command for a total of... 20 seconds. Her surge of motivation was short-lived, and it didn't take long for her legs to lose their strength and, after a quick repositioning, she was the one sprawled over the floor being brutally fucked by her boyfriend's borrowed body. And the only thing she could do was tremble and moan like the tired bitch she was, all her pride completely forgotten.
She had to accept the fact that Priti's body lacked the endurance to withstand Bob's libido on equal terms. Her boyfriend's host was just too much for her borrowed pussy.

And thank god, Adam was quick to catch on. He understood her predicament and immediately sank the whole length of Bob's brutal dick into his partner's vagina, choosing to employ the series of short deep thrusts that he knew would make him cum faster.

Less than a minute later, Adam enjoyed his fourth orgasm while Helen also came for the fifth time. After that, she felt light-headed, almost as in a drunk state. Her body was wobbly and kinda hard to control, to the point that Helen wondered if she was truly losing her grasp over Priti's body or it was just the fact that she had been pounded into oblivion.

"Are you okay?" Adam asked. Even though Bob's voice sounded a bit concerned, his face reflected nothing but pure satisfaction.

"I'm, uh... I guess so..." She hesitated, still struggling to regain her composture. "Oh dear, what a mess we've made."
She gestured to the pool of spunk and other diverse juices drenching the office floor and one of the tables.

"What the hell... D-Did all of that stuff come from us?"

"Mostly from you, Casanova." Helen told him off while glancing at Bob's veiny cock.
The massive tool had finally calmed down, and it was hanging peacefully from his crotch, still covered by the residues of their last fuck. It was apparent that, even in its flaccid state, the size of that thing could put most adults to shame.

"And that's not all, mind you. I can clearly feel a good chunk of it still inside my-" Helen corrected herself. "I mean, inside Priti's womb."

"Fuck." That's all Adam managed to say. "Should we... uh... get out now?" The boy added then, really looking forward to returning to his own body.

"Of course." Helen said in Priti's uptight voice. "That's if you want our 'gifted' friend Bob to get fired from his job as security guard after not noticing the event of such an orgy inside the building during his turn."

"Uh..."

"And things might get even worse for him if they ever discover that all this semen came from his balls." Helen added with a chuckle.

"Argh... Fine. let's clean this up." Adam accepted in Bob's gruffy voice. Then he added a bit lower. "And 'ourselves' too."

So both him and Helen did exactly that. They went to the restrooms and did all they could to get rid of the grime covering their nether regions plus the accumulated sweat by using water and papel towels. Then, they dressed their borrowed bodies with the clothes they were wearing originally (with Adam having difficulties when tucking Bob's dick back into his underpants and uniform trousers in a comfortable position that allowed him to walk without much discomfort).

After that, they spent the last 10 minutes carefully wiping the place where they had sex until both floor and table looked exactly the same as how it looked when they arrived (as long as no one brought an ultraviolet light).

"Very well, I'll be taking this!" Helen said in good spirits while grabbing the trash bag full of drenched paper towels.

Meanwhile, Adam was looking down at Bob's callous hands.

"I guess it's time to say goodbye." He muttered while flexing those sausage-like fingers.

"What's the matter? Are you sad you have to abandon your chonky body?" Helen said, teasing him in Priti's voice.