Dr. K helps her nephew out!

"How long will it take to finish working?" Mortimer asks. "I'd rather not walk around for longer than I have to with a raging hard-on."

"Could be hours," Dr. K responds, eyeing her nephew hungrily, though her gaze's meaning is visibly lost on Mortimer. "You could masturbate," she continued, slipped her lab coat off and revealing her black slacks and tight dark-blue button-down top stretched over modestly large breasts. Though her own curves were quite nice, she deeply envied Mega-Mom's more substantial curvature. "Go ahead, I don't mind."

"R-right here?" Mortimer stammered.

Dr. K nodded. "I should probably take a look at it anyway to make sure nothing's gone wrong," she said. There were no actual negative side effects that would affect his cock, but he didn't know that. He shrugged dumbly and dropped his pants right there, bringing out his sizable rod and stroking it. "I see nothing out of the ordinary, but I need to observe it for a while, just in case."

"It's... kinda hard with you watching, Aunt K," Mortimer says, stroking diligently.

"Oh?" she says, casually reaching up to her collar. She begins to slowly unbutton her shirt as she says, "Does this help?" Mortimer stares dumbfounded as she discards her top, then steps out of her flat-bottom shoes and casts off her pants, standing before her nephew in only her matching dark blue lingerie. She spins around, briefly showing him the back of her thong underwear, before facing him again. "Well? Does it?"

"Aunt K, what are... what are you doing?" Mortimer mutters, confused. He felt so dirty, being turned on by his aunt, but at the same time, it felt so right.

"Helping you, of course," Dr. K purrs. "Here, maybe this will help, too..." She reaches back and undoes her bra, tossing it to his feet. She massages her breasts, then tweaks and pulls her small, delicate nipples. She steps closer, licking her lips and staring at his big dick, when she notices something odd. His testicles have swollen more than normal. Curious, but more than anything glad to have an excuse, she grabs the hand working his cock and stops him. "I've noticed something unusual," she said. "If you don't mind, I'd like to take a closer look..."

"O-ok" Mortimer muttered, now barely able to form sentences between the shock of what's happening and the growing need to blow his load.

Dr. K gets down on her knees and grabs the thick shaft with both of her slim hands, working it thoroughly, his masculine smell filling her nostrils. Unable to resist, she leaned in and licked his tip. Mortimer protested weakly at first, but once her lips were locked around his head, he ceased. She worked him skillfully, taking his cock slowly, slicking each of his eight inches one by one, until finally she was sliding up and down his thick meat with ease, her gag reflex lost long ago in a chemistry accident.

"So... good..." Mortimer mumbled, barely coherent. Dr. K bobbed up and down with satisfying squelching sounds, cupping his inflated balls lovingly as she fingered her hard clit through her wet thong. "Gonna cum!" he shouted and instant too late. His balls swelled noticeably for an instant, and then shrank as the first delicious gush of cum filled her mouth completely. She pulled off and gulped down the massive load as another blast hit her face, then a third drenched her breasts. Her tongue darted out to lick the trailing drops from Mortimer's cock, then lapped up a gob of cum that rolled down her face. Thick drops fell from her face and breasts, dripping onto the floor.

"Interesting," she said, standing and walking to the table. She collected a sample off her chest, then turned back to Mortimer. His cock was visible limp, his balls back to normal with no signs of damage from the swelling. "Put it away now and go get the stuff," she said, casually swiping two fingers through a thick glob of cum clinging to her breast before sucking her fingers clean and continuing, "we've got business to take care of."

Mortimer weakly put his cock away. As he zipped up, he asked nervously, "Can... you do that again sometime?"

"Go!" she barked. Mortimer yelped softly and went off to do as he was told.