Someone else comes to talk to him, maybe try to persuade him

"Alright?" the woman asked

"I'll-- I'll listen." Isaac replied.

"It's never easy," the woman sighed. She clicked her radio on, "He'll listen, bring in the doc." she crossed her arms and leaned back on the couch. "I can only bag you if you say yes, anything more and other people gotta get involved." she rolled her eyes.

"Ah, thanks." Isaac said flatly, not at all excited for another person to see him like this.

Both sat in silence looking around the room for a moment. The front door opened and two people entered. Two women, one in a lab coat, and the other in some sort of medical gown. The one in the medical gown looked somewhat curvy, but he couldn't really tell as, well, it was a medical gown.

"Hello, Isaac, I'm Doctor Ivers, I'm with the team here today and part of the team that developed the product that caused your 'condition'. Now, I've been told you need more convincing to come into our care until we can develop a cure for what's happened to you." She spoke quickly, keeping professional eye contact that Isaac tried to avoid.

"I said I'll listen." I replied.

"Good, so listen close. We cannot, in good faith, let you go around in the outside world in your condition." she paused and Isaac just looked at her, "The product you were exposed to adapts the body to certain parameters, yours being producing and delivering cum. We know that you know of the effect it has on women. It adapts them to be able to receive your... exaggerated girth and increased volume of semen." The doctor paused again, eyeing Isaac's cock and blushing lightly, "Anyway, you will begin to have increasing need to have sex, which will spread your condition to others, and cause a great deal of pregnancies, as well as expansion in others, which would be our fault and cannot allow to happen. Do you understand?"

"Why even make this in the first place?" Isaac asked, his loins stirring at the thought of breeding so many women that it would be a problem.

"Irrelevant. This is about you." the Doctor replied

"I mean, I guess, but I can control myself pretty good." Isaac said as his cock grew erect and blocked his vision of the doctor, who stepped to the side to maintain eye contact.

"You won't, do you need a demonstration?"

"I'm pretty sure I can."

"Then I'm sure you won't mind if I introduce you to another person with your condition?" the Doctor gestured to the woman in the medical gown. The other woman smiled and the doctor untied some knots on the back and let it fall to the ground. Her body was revealed to be very curvy, much like Angela earlier, but even more so. Larger boobs, thighs, hips, belly, and pussy. Isaac eyed it, almost enthralled as his cock pulsed firmly.

"Like I said before, the body adapts, and she is fully capable of taking all of you in, Isaac." The doctor moved around behind him and rubbed his shoulders, making him gasp.

"May I please fuck myself on your dick?" the other woman asked pleadingly, juices running down her incredibly thick thighs. "Nothing else can fill me like you would."

"Yes! Please!" Isaac suddenly said. The woman gently grasped the end of his rod and angled it down. She turned around and slowly guided it in to her ravenous cunt. "Ah~ Fuck!" Isaac moaned as his tip entered. The woman backed up until her plush ass rested atop Isaac's overfilled balls.

"So resistant, hm?" The said as she stepped back. Isaac didn't hear her as he was fucked by the woman impaled on his rod. She brought a hand up to her stomach, which was greatly deformed by Isaac's meat. Isaac's mind melted as he felt her fingers teasing him through her skin. It didn't take much longer for him to start cumming. Her belly bloated out and down, visible from behind her. The two screamed in pleasure for minutes. The Doctor watched on in a detached manor while the agent blushed deep red and squirmed in her seat some. When it was over, the woman stepped forward as Isaac's softening dick schlicked out, soaked in her juices. The woman flopped down on the couch and her belly wobbled for several moments.

"Now then, Isaac. If this woman had not already had her tubes tied before she was exposed, she could easily be pregnant with at least triplets."

Isaac's head swam with the thought, his post nut clarity bringing him down from his sexual high.

"Yea... I guess I'm not as strong willed as I thought..." he said meekly.

"Not entirely your fault, your condition is mostly to blame. I hope you see now though how we have to curb this and try to prevent you from impregnating most of the city."

"I see what you mean. if I go along, what's going to happen to my house?"

"We'll hire a sitter for it."

"And my job?"

"They will be notified of your medical leave."

"Okay..." Isaac sighed, "I guess I'll go with you."

"Amazing, thank you for seeing reason." Doctor Ivers and the Agent untied him, the escorted Isaac and the other woman to two separate vans after helping them get dressed again. Isaac could see now that the other woman's body was softening considerably as it processed his cum. By the time he had gotten into the van he was fully erect again.