A few years prior

Content warning: watersports, mentions of scat

"Are you sure this is a good first video?"

"Of course it is, sweetie. Watersports might not be to everyone's taste but it's generally accepted as an ordinary part of pornography."

You didn't let the simulation render the smile you felt at the sight of your daughter/granddaughter Melanie, celebrating her nineteenth birthday by kneeling between your legs, your cock pointed directly at her mouth, just waiting for her to open it and start recording so that you could let loose a stream of piss straight into her mouth.

"That's not quite what I meant, mom," Mel said. "I meant, isn't this setting expectations a bit too high for what I'll do? Maybe I should start with having Aunt Stella stuff my pussy and ass full with four or five cocks each."

Joan shook her head. "There'll be time enough later for ordinary sex and gangbangs and such. If you want, Stella and I can spitroast you for your next video."

"Her next video should be getting knocked up by Katey," Nora pointed out. "It's family tradition at this point."

"Hey!" Mel objected. "I'll be the one to decide who knocks me up. I haven't got quite as much of a pregnancy kink as you, Grandma." She paused. "But yes, I want it to be Katey."

"I wish I'd had Katey use me as a toilet years before she actually did," Inez put in, dragging the conversation back to where it had started. "I was already quite popular by then, but I really took off once people knew that I was truly willing to do anything. And besides, once you've had Katey hose you down with piss and stuff you full of crap, you'll find that it's pretty easy to take it from anyone else. Nobody produces anywhere near the same volume or vileness as she does."

"Not 'anything', mom," Nora reminded her. "You still haven't let her dismember you, and the holo where she fucks my headless and limbless torso is still my most popular."

Joan nodded agreement. "Mine as well."

"I just haven't gotten around to it yet," Inez said defensively.

"I'm not against it," Mel said, "but how would that even really work in my case? I'm way more boob and cock than I am woman."

"Well, I did warn you that there could be downsides to going all-out with what your genecode let you have," Joan reminded her.

It was only the way the simulation played fast and loose with biology, physics and geometry that let Mel fit between your legs, or really let her be ambulatory at all. When you'd knocked up Joan after altering the simulation's history so she had always been amenable to sex with you, you'd injected a bit of your sisters' genecode in there as well, which came to fruition when Mel, almost immediately upon looking at what her parental changes allowed, decided she wanted breasts she could rest on as well as the three twenty-foot cocks you'd had when you'd fucked Nora all those decades ago.

And since Joan had back boobs, Mel was automatically able to have breasts that size on both sides of her body. The simulation just auto-adjusted space around her to make room for her outlandish assets, whether that was in a building, walking down the street with other people around, or being stuffed into someone's cunt.

You were pretty sure that you could have giant people walking around without causing any problems now, but you didn't have any desire to test it. You had other projects you wanted to get done first, like the notion you'd had to knock up everyone when they graduated from the adult school system before anyone else could get a dick in the fertile twats you were going to make everyone else have.

"You know," you suggested, "why not make this a family affair. Four generations all lined up to be my toilets? That would certainly be a good first video."

Mel shook her head. "Everyone already knows great-grandma, grandma and mom. I asked them to be here for moral support, not to steal the spotlight from me."

"Well, we don't have to do it on camera. I've got more than enough to go around for everyone," you assured her.

Mel took a deep breath, an action that, while hardly necessary, was nonetheless coded into the simulation as a way of dampening certain effects produced by the sometimes too-accurate brain emulation. "No, I'm ready. Should I do anything in advance or will you just start letting loose on me?"

"It's best to just get right into it," Joan said. "People are watching these to see you get degraded like a cheap slutty whore, not for any artistic talent you might have. If you want to show that off, though, I'm sure you could get a role in some mainstream film." Her tone made clear what she thought of people who would only do sexual acts on camera if it came packaged with some sort of plot.

"Hey, there's an audience for that stuff as well," Inez pointed out.

"Oh yeah?" Joan retorted. "Then why is it only ever the scene of you taking a dump in Caroline Haverty's mouth that gets into the compilations and not the two minutes before that where you finger yourself to her sorry excuse for a strip show before she invites you on stage to squat over her face? The film itself is aggressively mediocre but that one scene alone probably did more than anything else to normalise the scat fetish."

Nora nodded agreement. "Face it, mom, people aren't interested in having plot in their porn. If they want plot, there's pre-upload-style content for that. You really need to break out of your uploader mindset for good."

"I still think the scene after that where I lick Caroline's soles and suck on all her toes was better," Inez shot back.

"Pfft, foot fetish was mainstream before the upload and it's downright tame now. Sure we all gotta do a foot video every now and then but that's only because everyone will think you're weird as fuck if you don't like feet," Joan pointed out.

"Sure didn't feel mainstream," Inez said.

"That was just because of pervy weirdos who'd wank to any image where the camera accidentally caught a glimpse of the model's feet," Nora said. "Plenty of people had one, they just didn't want to be associated with those jerks, and most models weren't willing to make foot-focused content because of that, either."

"You know," Mel said, "as fascinating as it is to hear the three of you argue the merits of various styles of pornography, this was supposed to be my big debut."

Inez, Nora and Joan all coughed guiltily.

"Of course, sweetie," Joan said. "So, do you want to go through with this, or should we come up with another idea for your debut?"

"No, no, getting a golden shower from dad is what I want to do," Mel affirmed.

Not that anyone else would know it was you in the vid, of course; you didn't feel like having it be known you were involved in these. Not that there was any stigma attached to doing porn, of course, you just didn't feel like being directly associated with the ones you were in. Even the ones you'd done where having your face in frame was more or less unavoidable, you made it so that nobody could make the mental connection between you and the woman with a tongue-cock spraying cum everywhere, or whatever you felt like doing.

So with no more warning than the simulated sound of a clapperboard, you let loose with a strong stream of urine right onto her face.

Mel, for her part, despite the mild surprise, knew what was expected of her. She let the stuff splash on her and even bent her head slightly so it would get in her hair. Then she lifted herself a bit so it coated her shoulders and upper torso, and the tops of her boobs. Only once those were drenched and dripping did she realign her mouth with the stream and open up.

Meanwhile the recording was also capturing the massive heads of her cocks, all of them already drooling precum just from the hosing. Once Mel started swallowing the stuff, her form was rendered as quivering in orgasmic pleasure, and that was why even though you kept yourself anonymous in this part of simulated life, you were easily the most popular go-to for being on the giving end of anything to do with biological waste products, because people wanted to see porn stars getting off on being pissed on and shat in, and thanks to an override you'd coded in, it was only your stuff that was guaranteed to cause that reaction even for people who didn't have such a kink.

Nobody expected anything special out of either a piss video or a first video, so after five minutes of nothing but Mel cumming her virtual brains out while the simulation detected that she should be **** on the sheer volume of liquid flowing into her and rendered her accordingly, you relaxed your stream and ended the recording.

"We could do the next few right now as well if you want," you offered. "I'd be happy to shit in your nipples, knock you up while you're in a dozen pieces, and let you lick my feet."

"The arson, **** and jaywalking of modern porn," Inez quipped. Nora, Joan and Mel all looked at her.

"I know what those are but I don't think the analogy really holds up any more, mom," Nora pointed out.

"Hey, I found it funny," you said, sticking a foot in Inez's face, which she eagerly began pleasuring orally, until you switched her thought thread to rubbing it against her tit instead.

"No," Mel said, "I think I'd rather see how this one does first and then I'll decide what I want to do next. But I definitely want to do all that stuff, dad."

"Well, make sure it's all with me. I'm not passing up the opportunity to do it all with my first daughter's first daughter, who's also mine." Familial relations were only going to get more complicated, not just for you but for everyone. After all, genecode didn't care about familial relations and **** was practically mandatory regardless, and everyone was going to live forever, so there was nothing that would get in the way of an uploader getting knocked up by his billionth-generation descendant, a few trillion years after each had entered the sim and had had copious offspring prior to that, and had plenty of sons and daughters all up and down the tangled family bramble. The fact that Joan was your firstborn daughter and you'd also been the first to knock her up, to have Mel, who was thus also your first granddaughter, was downright simple compared to what you knew would eventually be the case.

"Of course," Mel said. "I wouldn't want to have my first experiences be with anyone else, dad." She shot a look at both her mother and grandmother.

"Hey, Tony and I just wanted a little time to get settled," Joan said.

"And Katey wasn't quite as willing to be the faceless benefactor when I branched out from just getting knocked up by every cock I could see," Nora added. Of course, unlike Joan, it was hardly egregious that she hadn't had most of her major firsts with you, as much as you might have liked that. Joan's popularity was still suffering from the revelation that she'd refused to have incestuous relations with you for three years or so after her debut, but instead of being angry at you for it, she just accepted it as the cost of getting comfortable with her main partner.

"She was still the first to put a bun in your oven," Mel reminded her. "So unlike you two, I am going to be properly dutiful and make sure my dad gets all my firsts."