Jeremy joins the game and things develop

"Aw yeah," Luca beams as she haphazardly manages to toss Nat's character off a cliff, winning the game. She bounces deeper and harder on her dildo in a victory edge, enjoying the relatively new feeling of being filled up with a cock-shaped item without having to worry about the game at the same time. "That was fun! I feel I did pretty good for my... first time."

"Uhu," Nat replied a bit distractedly. she had been plateauing to avoid climax and lifted herself off her own toy, moving over to her bed to find some tissues to wash herself dry to the touch. "If you like having that inside of you, wait until I find us a real cock to play with."

Luca blinked as she realized she'd forgotten about her plans for their brother. She fell backwards off her toy and rolled to the side with a squeal. "I was thinking about that before this match!"

"Oh, you were, were you?" Nat said as she handed Luca a fresh tissue. "But he's like your brother, though? Well, technically you're probably not related anymore, but still."

"You're his sister too now," Luca said in response, ignoring the fact that she'd sussed out her idea and that she was about to call dibs.

"True, but I didn't use to be. I used to be your tomboy gamer friend, recently turned girlfriend, now I'm the naughty step sis! I'm doing you a favor by popping his step-sis cherry."

Luca rolled her eyes and gave it a moment's thought. "Fine, you can get the first dib... but you're inviting him in here for it."

"Oh really now?" Nat said as she pulled up her pink thong, moving towards the door.

"Yup," Luca said with a smile and sat down in the couch, bottom half naked, with a game controller in hand. "I'm going to sit here and be focused on the game, you put him next to us," she patted the seat in the middle of the couch. "Here, and see where things go from there."

Nat rolled her eyes at Luca but Luca had already booted up a single player match and had begun ignoring her. "Fine, be right back," Nat said as she snuck out into the hallway and went over to Jeremy's door.

Jeremy startled as someone knocked at his door and promptly opened it, leaving him halfway standing with his body keeled over to hide his hand stuffing sweatpants erection back into his trousers. He quickly turned around from the door and did his best to stand up straight and build up some ire to defend his ego. As he turned his head around, he paused, seeing a black girl in a pink skirt and top leaning through the partially opened door. "Was it a bad time, bro?" she asked him, pushing some hair out of her face and gave him a smile.

"Bro? Natalie, This is..." Jeremy said as he quickly turned around to face her, hoping to reduce the visibility of his bulge. But as he turned around and looked at her, he suddenly remembered who she was. At least partially. "Hey, I know you... but you're not the same."

"I know, no time to explain. I'm Nat, your black step-sis now," she said as she opened the door and presented her body with the wave of a hand. "I... was wondering if you'd come and play some games with me and Luca? She's sort of zoned out right now and I'm... bored..." She said with a alluring pout, biting the tip of a finger.

"Luca zoned out?" Jeremy asked, "Wait, step sis... now? This makes no sense," he continued, feeling his head being filled with information that he hadn't experienced.

Nat rolled her eyes before she walked over to grab Jeremy's hand. "It's much easier to explain in our room. I'm sort of stuck on how to get her out of her blue screen of **** and I figured big step bro could help us out," Nat said as she pulled him along out of his room. She purposely stopped in the hallway causing Jeremy to bump into her, placing herself in the trajectory of his crotch.

"Whoops, I just wanted to close the door behind you," she said with a smile as she snuck closely around him to grab the door handle and pulled it shut, rubbing her thighs and hips up against him. "You always that big, or have you been rubbing yourself this early in the day?" she asked as she took his hand again and lead him towards her own door.

"I'm sorry?" Jeremy answered, getting more and more confused but also aroused by Nat's less than subtle flirting. He admitted to himself that this was like something out of his favorite porn videos, and he was beginning to wonder if he should let his guard down a little to see where things went. "Well, I don't know about you two, but personally I sometimes need to relieve pressure, so to speak."

"Completely understandable," Nat said over her shoulder as she opened the door. There he could see Luca sit in her couch, bottomless, playing a game of Smash Boys. "There," Nat said in a hushed voice, "See? She's completely lost it, hasn't even noticed she's not wearing underwear." she said to Jeremy as she lead him into the room. "You see those dildos? I have to admit, we sometimes do a bit of a gaming challenge where we use those while we game. Weird right?" Nat said and giggled as she picked up her own sex toy as a part of the explanation before tossing it over to her bed."

"More perverted than weird, I'd say," Jeremy said as he let Nat push him towards their sister, seating him next to Luca.

Nat giggled and nodded as she sat down next to Jeremy and picked up her own controller. "Its true, we're really naughty. Love to jerk off together, love to have sex together. Well, not as much with each other, but teaming up, so to speak. Nothing quite beats having a live dick to play around with," she said and glanced down at Jeremy's pants. "Anyway, I was figuring that having you in here would be helpful to get her back to normal."

"Back to normal," Jeremy said as he remembered something. He glanced back at Luca, seeing her glistening sex being idly rubbed between her shaved thighs. "Luca, I mean, Luke, is that you?" he asked the nonresponsive sister. As he waited for a response, he suddenly felt some hands around his crotch, unbuttoning his trousers.

"I understand it's weird seeing her as this for the first time, Jay. Anyway, I think this should help wake her up," Nat said as she pulled out his half erect cock and began sucking on it.

Jeremy was frozen in shock as the room suddenly went pretty silent. all he could hear were some idle sounds from the Smash Boys game set on low volume and Nat's mouth making wet noises around his cock. Jeremy gasped as she began working his cock in earnest, causing him to moan as he quickly came close to climaxing.

"Now, now," Nat said as she detached from his dick and let it throb in the air for a few breaths. "I can tell this would be a short event if we don't pace ourselves. You're ready to blow like you've not ejaculated in a month!" She said as she focused on the screen for a moment, joining Luca's game.

"I- well, you caught me at a bad time," Jeremy said in an apologetic tone. He looked over at Luca and saw she was still looking at the tv, but her legs were suspiciously eager at rubbing themselves together.

"Figures," Nat said as she took hold of Jeremy's right hand. "Well, looks like she might need a bit more help," she said as she guided his hand towards Luca's crotch. "take two fingers and slowly rub at her clit while we're playing over here. Maybe that'll reboot her."

Jeremy looked in horror at his hand as Nat placed it on Luca's warm and moist sex, curling a few of his fingers and helping him find a rhythm that seemed to make Luca press her hips against his hand. "There, I think we're getting close to something," Nat said as she went back to sucking on Jeremy's cock.

Jeremy felt very confused, but with every lick of Nat's tongue on his dick and every twitch of Luca's crotch on his fingers, he slowly began to give in to the fantasy and accept the situation. "Fuck Nat, you're amazing at this," he said as he leaned his head back on the couch, letting her do as she pleased.

It didn't take long before Nat was sitting on top of Jeremy, peeling her thong to the side to let him in. "Fuck me like the slut I am, Jay," she said in a husky voice as she slipped on top of him. Jeremy had fallen deeply into the fantasy and began jackhammering her. Something that apparently worked very well as she was instantly on edge. She moaned loudly as she quickly came, the dream of fucking her step brother too much for her horny body to sustain for long.

Luca glanced over as Nat fell off Jeremy's cock. In some miraculous way, he'd not cummed yet either. Luca smirked and leaned over, engulfing Jeremy's dick and sucking Nat's juices off of it.

Luca's eyes rolled in her eyes as the taste made something click in her head. Jeremy's cock tasted wonderful. She could not understand how she'd lived so long without sucking it. It was the perfect pastime while playing Smash Boys.

Well, she'd been sucking it for the past few days, but she was still enarmored by the novelty. She'd sucked plenty of cock in her life, but Jeremy's was just chef's kiss.

After a minute, Nat rolled around and saw Luca expertly sucking on Jeremy's cock. It was their favorite cock to share. Luca didn't know it yet, but Nat had decided to stop taking contraceptives a week ago, and was hoping to get pregnant within the next days with Jeremy. Luca had just sucked on it so far, but she was certain the moment she'd try it out she'd be eager to be a mom together with her sister with Jeremy as their man.

After Luca had her moments licking Nat off, Jeremy got up from the couch and undressed himself. "Come here the both of you," he said and pointed the girls to kneel in front of him. Luca and Nat beamed as they happily got into place as Jeremy began jerking his cock in their faces. It didn't take long before he ejaculated and they did their best at swallowing every drop he'd give them. They loved being covered in Jeremy's cum, almost more than getting creampied.

As Jeremy moaned and the last drop escaped his dick. Luca and Nat helped clean each other off of any spatter, not willing to wipe themselves clean when they could have another taste of Jeremy on their tongues.

A few hours later, Mary returned home to find her two adopted daughters cooking food in the kitchen. She could have sworn one of them had been a friend of her younger son, and the other had been her younger son, but that seemed sort of weird to discuss. She was more annoyed the girls hadn't managed to dress properly, running around in the kitchen with aprons and nothing but tattered tops and sexy underwear. They apologized to her as they ran upstairs with three plates of food and Mary thought it was nice of them to think of their big brother this late in the night. He'd have to put up with a lot seeing how they were the raunchy siblings in the household.

Luca awoke in the early morning in her queen sized bed, feeling peckish, but also having a massive urge to pee. She got out of bed and silently ran towards the bathroom. Both she and Nat had made passionate love with Jeremy that night. Every time they had sex, it still felt profound and life changing. Nat had probably gotten fucked one more time than her and she was feeling jealous. As she skipped past the bathroom mirror, she paused to look at herself. She caressed her pregnant belly, now in its third trimester, before feeling the baby kick her in the bladder, making it painfully necessary to release some pressure. Next door, she could hear the cooing of Nat's six month old baby starting to wake up.

"Jerry fucked you while I was in the shower, didn't he?" Nat said in a knowing tone. She was wearing warm weather clothing and fake exercise tights, strolling her stroller down the street. "Maybe," Luca said and gave Nat a smug smile, rolling her twin stroller and doing her best to keep up with Nat with her growing belly. Fortunately not twins this time, but still. She knew Nat was Jealous of her fertility, but she was sure it wouldn't take much for her to have another kid either.

"Every time we fuck the guy, something seems to happen," Nat said after rolling her eyes. "Like, I'm pretty sure we didn't have these yesterday," Nat said and pointed at her motherly breasts. Her body had matured with her pregnancy, but she still looked very attractive as she worked out, going for a early twenties mom look. "Or these little munchkins," she said in a coddling voice as she jiggled her stroller a bit, causing her little baby son to coo and giggle.

"I guess it's that app's fault," Luca said as they went into a park. "It'll open up again this afternoon. Maybe we can undo the distracted bit and get a clear view of things?"

"Yeah, I'm thinking that is probably the easiest way to get insight into this," Nat said as they greeted some handsome joggers crossing the road ahead of them. "I'm still surprised dad didn't say anything about this. Mom doesn't say much either, but she gives you that look, and you know she knows... something." she added after they walked for another minute in silence. approaching a public toilet building

"Oh she knows a thing or two. Maybe we should give her something to have fun with later?" Luca said as she parked her stroller next to a bench. The two mothers lifted their fists and struck the air three times. Nat got Scissors Luca Paper. Luca groaned as Nat did a little dance, leaving Nat to take care of her stroller and child. "Be back in a bit," Nat said and giggled as she walked over to the toilet building.

"I'm sure you will," Luca sighed as she saw one of the earlier joggers opened the door for Nat. They might have gone maternal, but they had their old habits. Twenty minutes later, after three guys left the toilet building, Nat returned to Luca. Her make-up was fresh and her fake lips and tits looked amazing. She was wearing high heeled leather boots and a thick coat with a fur hem that probably could keep her warm outside for hours.

"Here's for babysitting," Nat said while chewing gum, handing Luca a hundred dollar bill from a roll of cash.

"I hope we can be good role models for our babies when they grow up," Luca said with a sigh as she idly slipped the note into her bra.

"I think we're doing great," Nat said as she put the money under the mattress in her stroller. "Jeremy's got a good job, somehow from us sucking him off. We're moving into that new house next week, walking distance from downtown," she said and gave Luca a wink.

"And if we get bored, we can just earn some money changing ourselves with that app. Wouldn't you like to know what it's like being a black man or something?"

"But how could we suck on Jeremy's cock if we're bulky black dudes?" Luca said in exasperation to Nat as they strolled towards the park exit, the camera lingering on their rear assets. Nat's more synthetic than Luca's, but both still impressive.

"Oh, that's true. I'm not sure I can stop doing that," Nat added as they walked down the path, their words fading away.