Next Morning's Mouthful

You finished the report for yesterday's results with a clacking flurry of keys then snapped the laptop closed. It was hard to measure exactly how much more voluminous your loads had become so your estimates were very much conservative guesswork. That wouldn't be much of an issue though, since it had been observed from earlier experiments that initial volumes could fluctuate greatly so weren't good indicators for the amount your body would eventually 'settle on' . The projected timeline for your load size to level out was three days, with one already down. Hopefully the side effects would become less severe in that time too.

It was ten o'clock in the morning and your aunt walked into the living room, dishes from breakfast now drying on the dish rack.

"You... you're naked," was all you could manage seeing her approach the couch.

"Time for my load," she said simply, which did more or less explain things. "Is the pain back?" There was that worrisome crinkle in her forehead again.

"No?" you replied uncertainly as your erection slowly returned, straightening the wrinkled seam in your shorts. It was the first rise you had since you finally felt relief the night before, and for a moment there was terrifying twinge between your legs. Fortunately the sensation petered out and your cock seemed somewhat normal and painless when it got harder.

"Good," said your aunt with smile, getting down on her knees in front of you then pulling down your shorts. Your cock sprung out and slapped your aunt on the face,smile growing wider because of it. "So Brynn's coming back today?" she started casually, holding your cock and lightly brushing her lips along the shaft, teasing you.

"Yeah," you nodded, glad that so far it just felt good. You aunt's breath was familiar and comforting as she lazily nuzzled your erection.

"When?" she asked, now kissing the underside of you, moving slowly up from your balls, pressing her tender lips up your length inch by inch.

"In about half an hour," you said, glancing at the time on your phone on the table.

"ooo... cutting it a little close aren't we?" She followed this question up with a lavishly indulgent lick up and down your bulging rod, making you groan softly. "What if she comes before you do?"

"Then you'll need to wait longer for your load," you told her, not taking her bait. She was trying to tease you but you knew you had more power here. It had been quite a few hours since her last load. Her coming to you completely naked made it obvious how turned on and needy she was. Her nipples were stiff and long, her pussy had been glistening.

"Not gonna let me have my fun huh?" she said before finally taking the head of your cock past her lips, her gentle sucking drawing your precum onto her tongue. She popped you out of her mouth and hummed then licked her lips. "But your little lab partner might walk in on us," she noted, conspiratory in tone. "I left the door unlocked." At that you did jump a little and your eyes went to the door. You couldn't actually tell if it was locked or not from here and your aunt's poker face was impressive. You shook your head to yourself and smirked at her, put a hand to the back of her head and made her put you in her mouth again. She accepted your cock willingly and engulfed more of you, her thirst making her drool around around your girth.

"Nice try, Aunt Les," you commended her, feeling her tongue massage you while you gently fucked her mouth. "But you're not ready to be sprung yet. You don't want to tell anyone you're a lesbian cum addict. Especially if I'm your donor." There was a moan from your aunt as she pushed herself deeper onto your cock, the pleasure making you grind your teeth for a few seconds until she pulled off with a wet slurp.

"Mmmm, but Brynn is different," she said. "She's a researcher like you. She'll understand. And she's cute as button. A button I really want to press. With my tongue." She ended her sentence by wrapping her lips around you again and using that tongue.

"Fuck..." you sighed, slipping your fingers into her hair as she milked your cock with her mouth. Her mentioning Brynn put the buxom brunette in your mind and you could imagine her in just her lab coat and glasses, pressed up against your naked aunt, their lips locked, insofar as lips can be when tongues are lusty exploring opposing orifices. You slid in and out of your aunt's offered orifice for a few lovely minutes, her salivating drenching down to your balls. "I'm gonna cum," you announced, holding her more firmly as she pulled away. "I'm gonna cum so much for you Aunt Les." The woman was **** to go back down onto your cock and she struggled lazily, not really wanting to release you from her lips but liking how the resistance felt. You let her ease up just a bit and she filled the spare space with her tongue, stroking you while inside her mouth until your cum rushed up your cock to meet her. "Auhghh..."

You let out a long breath as your first spurt of hot seed shot up into the roof of her mouth, followup pulses cascading down her throat and onto her tongue. She sucked greedily, opening her airways to take all the thick flow she could. Your hips shuddered, the long orgasm cresting and making you shoot another powerful spurt amidst your ongoing bliss, filling your aunt's mouth to the brim. She had to let you out again, the overflow spilling down her chin but the lesbian catching what she could in her hands, tilting her head back to drain your load down to her stomach. You let off eight more creamy ropes onto her face and open mouth, getting most of it where it should go, where she wanted it, and then you leaned back to enjoy the show. She quaffed loudly and a low burp escaped her, then she look at you smiling. A thick glob of your jizz hung off the tip of her nose before it dripped onto her thigh. She scooped it up with her finger and sucked said finger clean before gently collecting the streaks on her face with her hands, her eyes closed. You reached out to help her. When she felt your touch she froze a moment, then put her hands down. You wiped your finger along her brow, down the side of her nose, a nice thick dollop of your spent jizz heaped onto the side of your finger. Pressing it to your aunt's lips she parted them and let you feed her, the woman sucking hungrily and opening her eyes as you went to clean up more of her face. She took your fingers in her mouth carefully, tongue make sure every drop was scraped off then sucking it cleanly just to be sure.

When the task was done your aunt was staring at your dick.
"You're still hard," she said as she stood. You sighed, not very excited about the prospect of spending another day suffering the side effects and hoping Brynn would have a solution when she arrived. You noted the time on your phoned.

"You better put some clothes on," you told your aunt.