Omega Ultra recently finished up their collaborative fanfic, this was my response ficlet to Lisa/Lilly's chapter:

Lisa Loud's Funtime Machine follow up (fifteen months later):

"You did this to us," the tired and slightly deflated man uttered, a smattering of babies surrounding him in the makeshift nursery. The many new Loud children required constant care, and since the VERY talented assorted sisters had far more lucrative jobs the white blond man had been 'volunteered' as caretaker, along with Lisa for her role in inducing the mess in the first place.

Thankfully the assorted incest and occasional regularly illegitimate offspring 'affectionally' dubbed The Sin Kids had finally gone to sleep, a rare feat for when one whimpered the rest were soon to follow.

"You made this happen." Lincoln glared at his glasses clad sister. "You set the machine up to take my jizz, and even before that you took it without permission to make sure this happened."

"Perhaps," Lisa calmly adjusted her glasses, before resuming rocking an offspring in their crib. Perfectly timed for maximum napping of course. "But it was for a greater purpose that of-"

"Getting your rocks off." The man flatly cut her off. "There was no scientific method about any of this. You sat there in your lab, repressing your sex drive- your Loud sex drive I have to point out- and when the pressure got too much you came up with this… whatever this is to get your rocks off while still pretending to yourself that you weren't just having 'alone time' like a normal person."

"A seemingly plausible hypothesis but-"

"No, I'm pretty sure it's a fact at this point," the man noticed that little Lina was squirming again. "Not that it matters, how are we on diapers? I think Sam's needs a change."

"Mostly full dear brother," She calmly handed him a fresh one from a packet, along with some wet wipes and talcum powder. "Thankfully I had the foresight to secure adequate supplies before this venture-"

"This 'venture' that ended with most of our sisters and half their friends squeezing out incest babies." He haggardly replied, picking up the still sleeping baby to the change table.

"Ms Sharp's offspring and a full third of the remaining-"

"Are not related. I'm aware, " the man quickly got to changing Lina with now well practiced motions, quickly stuffing a pacifier into the half woken infant's mouth to counter giggles. "Why didn't you just stop at us?"

"Because I needed a control group for comparison and our sister's friends were an adequate supply, which would be part of the scientific method that you assumed I had forgotten in favour of banal masturbation." Lisa asserted, absently stroking Mazzy's child back to dreamland in one of the 'half breed' cribs.

"Does the fact that you tricked us into incest mean anything to you?" The man sighed. "I mean, these kids are never going to have normal lives- if we tell them at all!"

"The norm as a standard for happiness is a fallacy," Lisa quipped contemptuously. "In all probability these children will have the full affection of a family that most 'normal' children would envy. Considering your own 'interests' you should have no-"

"There's a difference between fantasy and reality Leese," the man groaned. "None of us wanted this- and our lives are going to be about this from now on. I don't know how we can- Ronnie left me because of this!"

"I would suggest you calm yourself," Lisa placidly replied, separating a pair of Hispanic twins. "Ronnie Anne Santiago's distress is less related to her impromptu pregnancy and more related to your alleged 'dalliances'."

"Oh look, there's my point," the man griped. "She was special to me and-"

"And she will return to you once she has come to terms with herself," Lisa neatly placed a Blarney toy next to Darcy's child, lest she wake without him and wake the rest with a cry.

"I told you before, Ronnie's not a cuckold." The man bemoaned. "She nearly took my head off with that slap."

"Santiago is in internal turmoil is it true, and your presence only highlighted it. But in time she will come to accept herself and rekindle your relationship then, this is only a temporary state until then. I expect that she very well may encourage you to spread your seed further upon her return." The scientist took a quick nip of some kind of stimulant from a flask (not alcoholic, apparently a colleague of hers had fallen for the bottle under the same circumstances). "And the correct term is 'Cuckquean'."

"Firstly: 'spread my seed'? You did all the seed spreading, I'm just stuck with the bill-"

"If it any consolation Santiago may want to see it happen naturally-"

"SECONDLY: The correct term is 'you're wrong and I'm single forever'," Lincoln snapped, a bitter memory of Ronnie's rage flushed face arose in this mind, coupled with him suddenly being on the floor and his face swelling from a fresh welt. "I'm never going to have another relationship because I'd have to explain all of these and no one's going to believe the story. Hell it's a miracle that the girls all kept their relationships alive!"

The babies squirmed at his rising tone and Lisa shot Lincoln a look of that threatened experimentation if he didn't keep his voice down. Reluctantly the man grit his teeth and focussed on remaining calm.

"I understand that you are upset, but I must insist that you conduct your expressions of distaste in a suitable manner, street term; get your shit together."

He nearly shouted again, but bit down the sharp response. He focussed himself, and instead summarised his thoughts into one sharp but effective sentence.

"Lisa; none of us would have chosen this."

Lisa considered this for a moment, then…

"Lilly alone proves otherwise," she neutrally dismissed, replacing a pacifier that little Lyra had lost.

"Lilly was- Lilly…" Lincoln tried to counter. And failed miserably.

"Lily was way too into this."

"Indeed, admittedly perhaps I should have considered her perversions before letting her attempt the machine again."

The man sighed. "Well I'm glad you can admit that much, but seriously though; triplets?"

Lily's infant pile had their own crib, with assorted minor occult symbols carved into the wood by Lucy. When queried why all she would say was "soon".

Honestly Lincoln didn't care this point, after four months of taking care of assorted newborns he was ready to welcome the relief of hell's gates from this purgatory.

"Twins this time actually," the genius mused.

"… This time?"

"Apparently the process of labour and motherhood only increased her enthusiasm for consanguins intermingling." The scientist confirmed. "But surely two more makes no more of a difference now regardless."

"Fuc- You're just saying that because you have one on the way yourself," the white haired man jabbed at her several months pregnant stomach. "And it's not mine for once, nice to see someone making branches in the Family Tree rather than knots but it really shows where your 'scientific curiosity' ends Leese."

"If you're referring to the fact that this is David's offspring rather than your own then you are partially correct." Lisa affirmed. "But I think you will find that I have not spared myself from this experiment-"

The man stopped changing Lina for a moment and gave her a quizzical look. "… I thought you were having David's kid."

"I am, your faculties have not yet deserted you dear brother."

"But you're part of the experiment?"

"I believe you can refer to my previous statement."

"As part of the control group?"

"Not quite dear brother."

The man carefully scooped the half sleeping child before gently rolling her on her back in her crib, along with three other children from assorted female friends of the family. "Are you having some kind of twins, one from me and one from him?"

"No. Thankfully I am spared the displeasure of more than a single pregnancy for now," The scientist asserted.

"But you said that you weren't part of the control group."

"I'm pleased to see that your grasp of the obvious remains firm, dear brother."

The tired man turned over her statements in his mind, gazing at her impassive opaque lens es to try and discern the truth, but all he could gather was the slight twitch of her lips that indicated her internal amusement at getting one over her less intelligent siblings. Suddenly something came to mind; her lab.

For the past few months a large cylinder had been fixed in the back, any questions about it's contents and the assorted panels had been waved away or simply responded to with "do you really want that question answered?" which would dissuade the asker upon consideration of what fuckery Lisa had wrought. But now and then the cloudy glass would allow a glimpse of a shadowy form, sometimes human like with too many fingers, but othertimes it would have some kind of segmented tentacle with a claw…

"That thing in the lab… that's not human is it?" He Asked with dawning horror.

"Hmm," Lisa hummed for a moment in contemplation. "It usually qualifies, we shall know for certain when the incubation is complete."

"It's mine isn't it?"

"Strictly speaking it's many-"

"God dammit Lisa."