You are, but Becky's not

Rebecca jerks away from you, her eyes wide.

“WHAT did you just call me?!?” she demands.

You blink, and replay the conversation in your head.

“... 'bitch'?”

She glares at you. “That's what I thought. Where the hell do you get off using that kind of language with me, John?! Just because you're impregnating me and making me orgasm, you think you can insult me?!?”

“I, I, I... I meant it like, bitches who get bred? Like dogs?”

She rolls her eyes. “And when I say that's bullshit, I mean it's very powerful fertilizer.”

“I... I'm sorry?”

“Yeah, you should be.” She gets to her feet and starts putting her underwear back on.

“What?! Wait - where are you going!” you ask frantically.

Rebecca looks at you. “You ruined the mood. I'm going to hang out with Elias for a few hours. He's still my fiance and I still love him. Don't worry, I'll join you in bed tonight and you can fuck me some more then.”

She picks up what's left of her dress, clearly pondering whether it can be repaired.

Just then, there's a noise in the hallway outside the room. The doorknob twists, and as the door swings wide, you can hear Elias saying “ - was fertilizing Becky! I feel so honored!”

Your older brother strides in cheerfully, followed by your mother Erin, your twin sister Caitlin, and your younger sister Dana. “I still feel bad about earlier," he says to you. “So I figured you'd like some more girls to fertilize, and -”

He realizes you and Becky are not cuddled up together and fucking.

“... what's wrong?” he asks, his voice nervous.

“John called me a bitch,” Becky says flatly. Elias looks shocked for a few seconds, and then even angrier than when he caught you fucking her.

“I said I was sorry!” you protest.

“You fucking should be,” he begins, and he's actually making a fist, and that's when your mom steps in between you and Elias and yells “STOP IT! STOP IT RIGHT NOW, ELIAS! NOW!”

Caitlin and Dana look horrified.

Elias freezes. “But, but mom, he called her a -” he sputters, and then trails off with the realization that he sounds like he's in first grade.

“Elias,” your mom tells him firmly, “I think you and Becky should go home now. You can visit again another day.”

“Can't,” Becky says. “I have to spend every night with John until we're sure I'm pregnant.”

“Well... you two can go for a nice long stroll together, then,” your mom tells her. “At least six blocks. While I have a long talk with John.” She realizes that Becky is still wearing only underwear. “Also, what happened to your clothes?”

“John said he wanted me to rip them off, so...”

Your mom sighs. “You and I are close to the same size, so you can borrow whatever of my clothes you need,” she tells Becky, who nods.

You watch, baffled, as Elias and Becky walk out of the room.

Your mom sits down on the bed with you, then motions to Dana and Caitlin to sit down also.

“So," your mom says. “You wanna tell me what the hell that was about?”

You sigh. “I guess I... I got excited? Too excited?”

“You got so excited you called Rebecca a bitch?” Caitlin asks in a very dubious tone, and you feel awful.

“I... maybe?”

“What exactly did you say?” Dana asks.

“We were making out, and I said... 'are you ready to get fucked... bitch.'”

Your mom winces. “And where did you get the idea to use that kind of insulting language?”

You shrug. “From... porn, I guess?”

Your mom slumps. “John,” she says, sounding very tired, “you are an adult. You're twenty-one. You should know the difference between porn and real life.”

You heave a long sigh. “I... I guess. I'm sorry. I... I already told Becky I was sorry, but I guess I owe her an explanation too.”

Caitlin and Dana hug you, and after a moment your mom joins in.

“We love you, John,” your mom says. “We do,” Caitlin says. “Uh huh,” Dana says.

“So we want you to be happy,” your mom says. “In the real world.”

“Okay,” you say.

“Remember that,” she says. “You live in the real world. Not in a porno.”

You are acutely aware that you are completely naked, and that your dick is still covered in Becky's fuckjuices, and that neither your mother nor either of your sisters has even mentioned this. Still, you feel a bit nervous when you say:

“But I can still fuck all three of you, right? Breed you?”

Your mom smiles widely, and kisses you on the mouth, gentle and caring.

“Of course you can,” she says. “What's your point?”

Now that you know where this is going, you feel more confident - but Becky was genuinely upset with you.

“This will maybe sound stupid, but... I mean, I'm about to fuck the three of you. You gotta admit - that's kind of like a porno?”

Your mom sighs. “The girls in porn are actors,” she says. "They're being paid to pretend to like it. We're real people. We have feelings. Just remember that, and you'll be fine.”

Caitlin takes your head in her hands and kisses you on the mouth, slow and romantic.

“You're my twin brother,” she says when she's finished. “You're my best friend ever, I love you more than anything, and if you treat me like shit because that's what guys in porn do to girls in porn...” Her voice gets real low. “...I vill break your fookin' arm, ya?”

Dana giggles in recognition, and you can't help but grin. “Okay, okay,” you say. “You've made your point.”

Your mom looks perplexed for a moment - unlike the three of you, she hasn't watched Euroghouls V: Bloodbath in Bucharest a dozen times - but the situation is clearly resolved.

“My turn!” Dana says, and kisses you on the mouth, wild and enthusiastic, with lots of tongue. After a moment, you feel a warm wet mouth engulf your cock. You keep the kiss going for several more seconds, then stop and look down to see who's sucking you.

It's Caitlin. “You look beautiful like that,” you tell her honestly. She stops sucking and smiles. “Thank you,” she says. “Let me know when you're getting close - I don't want to waste any of this!”, and then she gets back to work.

Dana is stripping; her tits are larger than you had realized, and her pussy is completely shaved. She pinches her nipples and moans.

“I'm so glad you're going to be my first,” she says to you. “I can't wait to have your babies!”

Your mom suddenly looks uncomfortable. “Uh, John?” she says.

“...yes?”

“I'm forty-four, I'm past my peak fertility,” she says apologetically. “I don't think I could have more than two of your babies. Maybe three, if we're lucky.”

“Mom, it's okay,” you say. “As long as we try -”

“'Erin,'” she says. “You're breeding me, so call me Erin.”

You smile. “Erin,” you say, “show me your tits. And your pussy.”

She smiles too, and begins undressing - first, her BIRTHDAY MOM t-shirt, then her bright blue bra, to reveal tits that are not as perky as Dana's, but still a lot less saggy than you were expecting. Her jeans and panties are next. At the sight of her landing strip and her glistening wet pussy, you start to feel that familiar tingle at the base of your cock.

“Caitlin, stop,” you warn her. “I'm getting close!”

She obediently lifts her mouth off you.

“EVERYTHING OKAY UP THERE?” you hear your father call from the living room; you wince, and go limp.

“IT'S FINE, JOHN IS JUST FERTILIZING US,” Dana yells back.

“AH, OKAY.” There is a pause, then your father continues. “ANYTHING I CAN DO TO HELP?”

You blink. “NO, BUT THANKS FOR ASKING,” you yell.

“OKAY. I'M GOING OUT FOR A STROLL," he yells. “HAVE FUN!”

A minute later, you hear the front door open, and then close again.

“You're gonna have to stop fucking him until you're pregnant,” you tell your mom - you tell Erin. “To make sure it's mine.” For a second, you feel a little guilty - your dad's a genuinely nice guy. “I... hope that won't be too inconvenient?"

She shrugs. “It's fine, your dad's asexual. Loves to cuddle, but that's it. He'll be glad for me!”

Caitlin shimmies out of her dress and then her underwear. Now the four of you are nude.

“Here, lemme get you hard again,” she says, and starts licking your shaft, then slurps the head back into her mouth.

“Actually,” you say to Erin and Dana as Caitlin bobs up and down, “I think what might get me even harder is... watching you two fuck each other?”

“Sure, that makes sense,” Erin says. She takes Dana in her arms, and they begin tongue-kissing, right next to you. Erin works her way down Dana's body - from her mouth, to her neck and throat, to her collarbone, to those massive perfect tits.

“Oh god, my nipples are so sensitive!” Dana squeals; she begins squeaking and panting, and goes red all over, and you realize she's orgasming just from having her tits sucked. Erin continues downward; eventually, she's kneeling on the floor next to Caitlin, with her face buried between Dana's thighs and her left hand buried between her own.

As you expected, the sight of Erin eating her 18-year-old daughter's pussy has you rock hard. Although to be fair to Caitlin, she is an excellent cocksucker, and the noises Dana is making as she cums over and over are incredibly hot, so you guess it's a group effort.

“I'm getting close again!” you tell them. Caitlin takes her mouth off your cock and says “Dibs!”