She suddenly grows a cock and balls.

Breakfast had finished and the two family members had separated without much talk, Jack to his room and his mother to clean up. She sighed to herself, shaking her head... unaware of what was coming to her.

A short time later, Jack, while replaying the same game for the fifteenth time, would pause at the sound of his mother yelping loudly. "Mom?" As much as he didn't want to spend time stuck with her, he did care about her and wanted to be sure she was okay...

When she didn't respond, he got concerned, getting up and heading to the kitchen in a hurry, a slight panic taking hold as he assumed something bad had happened.

Jack froze at the scene before him: his mother, standing with her robe wide open, panties ripped on the floor as the biggest dick he'd ever seen throbbed between her legs, at what looked to be about a foot long erect. Hanging below it were a pair of heavy looking balls, about the size of tennis balls. He couldn't fully process what he was looking at, and judging from how his mom was just standing in as much shock as he was, neither could she.

And then she seemed to snap back to reality, blushing heavily and hastily trying to hide her new appendage, pulling it into her robe and struggling to hold it, letting out an involuntary moan as the touch aroused her sensitive member.

"J-Jack! Don't look at me like that! H-help me!" she stammered out. Jack shook himself off.

"What the- What the heck am I supposed to do about... that?!" he shot back, unable to look away from the unsubtle bulge in her robe.

"I don't know! Get me some pants or something! Please!"

With that, his body finally was able to move again, running to find something to help her cover up. A short time later, they were sitting together in awkward silence, his mother now wearing a pair of his baggy jeans to try and hide her cock, which had softened a bit.

"So how the fuck did-" Jack began, only to be cut off.

"Do you think I know any more than you? One moment I'm cleaning up, the next I have... this... popping out of my panties."

"Should we... go to the doctor?"

"What's a doctor going to do about this? I don't think it's medically possible to just... spontaneously grow a fully functioning... set of male genitals."

"So... what now?"

"I just... let's just pretend that this isn't here, okay? I'm still your mom, this changes nothing. Got it?"

Jack nodded, though he had a strong suspicion that things wouldn't be normal for some time... Especially with his mom now being twice as hung as him...