On them.

Jonathan wanted to pull out but Crystal's spasming tight cunt had a vice-like grip around his thick shaft, which in turn made it even more appealing to leave his cock buried deep in her. The sliver of lucidity he had reminded himself that even though the girls had the subdermal contraceptive implant, it was not 100% effective — the implants were only effective in preventing them from ovulating and it takes time for the hormones released to decrease the uterine lining and thicken the cervical mucus to prevent sperm from entering the uterus altogether — so there was still a chance he could impregnate her. Luckily his logical and rational side of his mind had won out.

Placing his hands on her ample ass cheeks, Jonathan reluctantly pushed himself away from butt just as his dick released the first jet of semen that landed on the mattress, the back of her head, and shoulders. He grabbed his enraged cock like a firefighter trying to control a high pressure fire hose as he continued to spray cum on Crystal's back. Her sisters, not wanting to be left out, laid down next to her and they too were coated with hot, sticky cum on their tits and bellies. When he had finally emptied his balls, Jonathan collapsed on the massage bed covered in sweat. Jade and Amber cuddled against him while their sister moaned softly in the afterglow of her long, hard fuck, rubbing her swollen redden snatch.

"Holy shit..." Jonathan sighed, staring up at the ceiling as he began to comprehend what had just happened and the possible repercussions, both professional and personally.

"Regrets already?" Amber whispered in his ear after noticing the worried look on his handsome chiseled face.

He was about to answer but paused for a moment when he felt Jade's tongue on his flaccid cock, slick with the juices of all three sisters. "No, I have no regrets having sex with the three of you," he replied. "I needed to get that out of my system after yesterday's pent up sexual frustration." The girls giggled at his revelation but of course he had intentionally left out his tryst with the redhead bartender.

"We never had a man take on all three of us and make us all cum multiple times," Amber smiled.

"Well, I have a reputation to live up to!" he chuckled as Crystal laid down next to him, opposite of Amber, and gave him a kiss.

"Thank you for the amazing orgasms," she smiled.

"I hope I wasn't too rough on you girls," he said.

"Nope, you were perfect in every way," Jade grinned, sitting on his thighs.

"Oh shit, what time is it?" he blurted out, slipping his left arm from under Crystal so he could look at his wristwatch. "Six fifty-five!"

"Oh my God, we were having sex for that long?" Amber grinned.

"We should clean and shower before the other girls wake up!" he said and sat up, only to be kissed by Jade.

"You don't want to go for round two with us?" Jade asked with a sly smile.

"Girls, I'm serious..." he said sternly as he moved her off of his lap to stand up. He walked over to grab a towel and a bottle of disinfectant to wipe clean the pools of bodily fluids the girls had squirted on the massage table.

"What about sex in the shower?" Amber teased while she and her sisters toweled themselves off.

"No," he grumbled.

"'No' as in 'never' or 'not now'?" Crystal wondered.

Jonathan looked at the three girls and knew they would never take no as an answer during their long stay in the underground facility. "Not now," he sighed.

"Fine, we'll take you up on that raincheck!" she chirped. "We'll see you in the shower room!"