Eric noticed his son was anxiously pacing closer and closer to the plastic tube on the bathroom counter. "There's still six more minutes on the timer. And, besides, the box does not clearly indicate if this pregnancy test works for men who develop female reproductive organs as a result of a scientific mix-up."
Eric was just as eager to know as Josh, but his son's naked, eighteen year old body was pleasantly diverting his attention. From his messy-but-perfect bedhead, to his piercing brown eyes, nearly flawless tanned chest, and the perfect cock that bounced over two hefty balls with each step, Josh was a welcome distraction.
The timer on Eric's phone went off and he and his son rushed over to see two lines on the viewing window. Josh nearly shouted in delight and Eric was not sure whether to be shocked, excited, or terrified that his son had (probably?) gotten him pregnant. But Josh's joy was infectious and suddenly Eric was being picked up and covered with kisses.
Eric wrapped his legs around his son's waist as his arms draped over Josh's neck. As their lips pressed against each other, Eric felt his son's cock rising to it's full 8" beneath him.
Josh carried his father back to the bed, laying him down, spreading Eric's ass cheeks, and working his tongue in and around the pink hole. Eric greatly appreciated how Josh can come to love eating his father out. Soon he was moaning and pushing his ass further down, letting Josh's tongue get deeper and deeper.
"Oh son, I need that big cock in me now."
Josh was happy to oblige and slowly inched his throbbing erection into his dad's hole. The look on Eric's face as his shaft went deeper and deeper was worth taking it slow, even though Josh was tempted to wildly pound his dad's accommodating ass.
"Fuck dad. That ass is just as good as when I bred you the first time. Do you think that's when I knocked you up?"
Eric could only moan with pleasure in response.
Josh sped up as he remembered that first time weeks ago.
"I blasted so much cum up inside you."
Another moan from his dad.
"You ready for another load dad?"
"Fuck. Yes. Breed me again," Eric managed to get out as his own orgasm overtook him.
Josh's cock unleashed a torrent of cum inside his dad's hole, as both men collapsed.
"So, how do we know for sure?" Josh asked.
Eric knew he had a very awkward call to make.
***************************************
"Dr. Andrews speaking," Eric heard the voice come on the line after an annoyingly long wait.
"Hi Dr. Andrews it's Eric Smith."
"Hi Mr. Smith, is everything alright?"
"Well I had a question for you. Let's say I was curious and took a pregnancy test. Would it show positive just because of all the changes in my body? Or would it be like a regular pregnancy test? Or just not work?"
"Well the pregnancy hormones detected by the test aren't generated by the regenesis stem cells themselves, so I would not think there'd be any reason for a random positive pregnancy test, but... why are you asking?"
"Umm... "
"Mr. Smith if this is more than a hypothetical, you really need to tell me given all that's going on."
"It's... well... let's just say..."
"Yes, understood. Can you come by the clinic this afternoon? I have an availability at 3:30."
"Sure, I will see you then."
***************************************
Josh called off sick from his lifeguarding job and went with Eric to the appointment.
Dr. Andrews looked at the man and his son, "are you sure you want your son here for this? I admire your relationship but I have a few sensitive questions that will need to be asked."
Eric turned to his son and back to Dr. Andrews, "why don't you just ask your questions and if they get too sensitive I'll have Josh leave."
Dr. Andrews cocked an eyebrow but continued.
"So I take it from your call there has been an occasion where you had receptive anal penetration?"
"Yes, about 3-4 weeks ago."
"Right before I had the chance to warn you then," Dr. Andrews looked away guiltily.
"Well, I was fairly drunk at the time so it may not have mattered."
"Well you wouldn't be the first to pick up a stranger at the bar."
Eric just nodded silently.
"So no condom used?"
"No"
"Okay. So we may want to test for STIs."
Josh began to open his mouth but his father lightly nudged him.
"Have you noticed any new symptoms? What inspired the test?"
"Well, I had been nauseous the past few mornings. And my pants have been getting a little tighter."
"Got it. Well, we have some blood work to run to confirm but it's all consistent with pregnancy so I would not be surprised."
"But what does this mean, in terms of like... my dad being pregnant?" Josh couldn't help but ask.
"Well we were already dealing with plenty of unknowns to begin with and we've entered an even more uncharted area I'm afraid. My specialty is hormones and the like, so this really calls for an obstetrics specialist."