Use Your Sisters Instead

"It couldn't be better than his cock," Tabitha said, "There's no way."

Chastity slowly stood, her legs trembling slightly under her. She went over and gave Mary a kiss on the cheek. "So, Mom, now that Tabby's pussy's been fed, what's for dinner?"

*

Mary woke up earlier than usual, needing to pee. She rolled out of bed and made her way through the dark house to the bathroom. The sun wasn't even over the horizon yet, but the kids would all have to get up for school soon.

As she opened the door, she heard the hush of running water. Looking through the tinted glass doors of the shower, Mary could barely make out Michael and Chastity. The blonde's legs were wrapped around her brother's waist. He was pummeling her into the tile wall. The two of them grunting and gasping.

Mary didn't want to wait, so she quietly sat down and used the toilet. She watched as the two of them humped almost violently. Too involved in each other to even notice she was there.

When she was done, Mary stood up and then slowly made her way out of the bathroom.

"I'm going to fucking CUUUUUMMMMMMMM," Chastity screamed as Mary carefully closed the door behind her.

Later that afternoon, she came upon Michael sitting in front of the computer. Tabitha was sitting on his lap. Her bare breasts bouncing. The desk chair squeaked rhythmically along with them, telescoping up and down as brother and sister railed each other. Tabitha was gasping, "hu HU hu HU hu HU." Panting like she was having an asthma attack. Desperate for breath.

After Mary passed, she heard the squeaking stop, replaced by her youngest daughter's orgasmic howl.

"Oh Tabby, you feel so goooooood!" Michael yelled.

That night, as Mary went off to sleep, she heard Hope's bed banging against the wall. She couldn't help but satiate her curiosity. She found Hope on top of Michael - her favorite position apparently. Michael leaned forward, his mouth wrapped around one of his sister's little breasts like a baby at the teat.

They were locked together in a way that made it hard to move, so they just slowly rocked against each other. Like a steam engine gradually building speed. Hope ran her hands through Michael's curly hair. He hugged her close as he could. The two of them trembling in each other's arms.

"Getting close," Michael whispered. He snaked his hand down to the juncture where brother's cock met sister's pussy.

"That's a good boy," Hope said. She stiffened. Her chest flushed. "Ahhhh, that's a good BOY! Give your big sister everything you've got."

Mary carefully closed the door behind her. This was her new normal, she supposed. And she was surprisingly alright with that.

*

Tabitha looked down at her pussy, confused. It was early morning and she was still naked. All the girls had started sleeping that way, just in case.

Usually Tabitha's vaginal secretions were whitish, like a pale match of what her brother produced. And unless he was in the room with her, Tabitha rarely got very wet from just walking around. Sure, she was used to being drippy a lot of the time now, but this was somehow different.

That morning, Tabitha felt like a leaky faucet. Her legs already slick with her essence. And the fluid coming out of her was clear and more slippery than usual. It was all a bit strange, Tabitha had to admit.

She decided it would be best if she passed Michael off that day. Just in case. If there was something wrong down there, it would be a mistake to do something that might make it worse.

Just as Tabitha resolved to tell Michael to use a different sister, she heard him bang on the door. It wasn't a set signal, really, but she knew the sound all the same. He was there to take care of his needs. Tabitha opened the door, not bothering to cover herself. She was careful not to hurt her brother's feelings, but she told him she wasn't feeling well and asked if he wouldn't mind trying Hope or Chastity.

"Fuck," Michael said, "Neither of them are around. I guess I can go rub it out this time. We've been so good lately. I'm sure it'll be fine."

"No," Tabitha said firmly. She could picture the talking to she'd get from Momma if she didn't let him in. Whatever was wrong, it couldn't be worse than sending her older brother to Hell. "I'm happy to help out. Let me get ready."

Tabitha climbed up on her bed and lay backward. It felt a little comforting to go back to the old standby. They'd been doing all kinds of things in all sorts of places - lying back on the bed felt almost quaint.

Michael shucked off his clothes and then stood on the edge of the bed. His penis pointed out proudly.

"Did you... prepare?" Tabitha asked.

"No," Michael said, "Haven't even touched it."

"Awesome. I want this to last."

She reached down and took his cock in her hands. "God, I love my biiiiiig brother," she said. She really meant it, too. Before all this - before Momma had told them about her plan and they'd all started taking care of their brother - Tabitha had always felt close to Michael. More than what she'd felt for Hope (who was always so patronizing) and Chastity (who was always so mean).

Michael was different. He cared about her. Legitimately cared. There were times when she'd even thought he might have feelings for her. The kind a brother shouldn't have for his sister. And then, as she got older, she began to think that she might have those same feelings, too.

Of course, now, those desires felt perfectly ordinary. Natural, really. Tabitha studied her brother - his toned, muscular body. Deep brown eyes and playful, curly hair. And, of course, his cock. His wonderful, fantastic, oh-so-pleasing penis. Like it had been created just to cause her joy.

"Oh, Tabitha," Michael said, "You have no idea how badly I used to want you. Lying back in my bed. Picturing you. Us. And now to be with you, here. It's like a dream. Better than a dream. Best."

"I didn't know then, but I wish I did," Tabitha said, "I wish I could go back to that girl and tell her to get right into her brother's room. His bed. I wish I knew how much I wanted you. Needed you. You'd have had my virginity the day I turned 18. The fucking minute. I swear I'm sorry I made you wait so long."

"You gave it to me in good time," Michael said and smiled, "I can hardly complain about that. Now, you want me to get you ready?" Michael asked. He started to kneel down. Tabitha had learned to love Michael's licking, but she thought about her dripping pussy and decided not to risk it.

Besides, the sooner Michael put his dick in her, the sooner she would reach her pleasurable apex. God, how was she going to live without this once she went away to school in a few months?

"It's OK," Tabitha said, "I'm already excited just by looking at my big brother's big cock." She took his member - so hard, so soft - and placed it at her pussy.

"That's my baby sis," Michael said. He shoved himself in to the hilt, like it was nothing. Usually, even after a licking, it took a little effort to work himself into her. Michael looked down at his sister in amazement.

"What's wrong?"

"Just thinking about how lucky I am to be with you. To feel your pussy squeeze my cock. Fill you with my cum."

"Oh you like how I squeeze your cock, huh?" Tabitha asked. She bore down on the warm, hard invader in her snatch.

"Oh FUCK!" Michael cried. "What the hell was that? I almost came right there, I swear to God."

"Kegels," Tabitha said, "Pussy muscles. I've been reading about them."

"You've got to share that book with Hope and Chastity," Michael said.

"Oh hell no. I've already got too much competition as is with your darling Hope and horny Chas-titty."

"She's not my darling. I love each of you. You know that. And I love your little boobs," he said. He reached over and squeezed them, being sure to pinch her nipples. Tabitha felt the pain shoot down to pleasure in her dripping puss.

"Yes - show me," Tabitha said, "Give your Tabby Cat her delicious cream."

Michael smirked. He drew back slowly, then entered her again, lovingly. "You want the Hope way?" he asked. Then he slammed into her hard. "Or the Chastity?"

"Oh!" Tabitha groaned, "Give it to me my way. My way only."

"That's my girl," Michael said. He began plugging her. Varying his strokes between long and short. Hard and soft. Reaching down and smearing her clit with his hands.

Michael had become quite skilled, Tabitha thought. But this was even beyond what she'd come to expect. It felt like her whole body reacted to every thrust. Sparks raced down her arms. Her legs. Her pussy clamped down, squeezing every bit of her brother's beautiful dick. God, if sex with Michael before had been like touching pleasure - reaching it - then this was like bathing in euphoria. Immersing in it. Drowning.

Tabitha screamed. She whimpered. Words came out that made no sense. Exclamations of incredible bliss. Her brother was doing something to her she couldn't comprehend. And all she could think about was that his cum was coming. His beautiful bounty of sperm that would take her to an entire new level of heaven.

Sperm, she thought. She was so used to fucking without consequences. It reminded her, suddenly, of what the act was supposed to do. Put her brother's baby inside her. Would that be so bad? She pictured herself swelling with life. Life that her own brother had given her. For a moment her traitorous mind wished for that. Wanted it. More than anything in the world.

"Going to cum," Michael said, as if he could sense her aching need.

"Oh Michael, I want it," Tabitha said, "Want it so bad."

Michael buried his head in his chest. His movement slowed.

"I... Tabitha," he mumbled into her chest, "I love you. You know that? Not like a brother. But more. I think... I think I always have."

"I know," Tabitha said, "I love you, too."

Michael began to shake, tremble. His enormous fuck stick lodged itself right in Tabitha's cervix. Then he threw his head back and bellowed. Tabitha's own orgasm built and built but then stopped. Right at the edge.

She felt that odd pressure at her pussy - almost like peeing, but far more pleasurable. Her brother's first hot burst blasted into her pussy and Tabitha felt like her whole body was about to shatter. Explode from the inside out.

"Oh, ffffffffFFFFFFFUUUUUUUUCK!" she screamed. Gouts of her cum blasted out - long hot streams. This time it really felt like an unending flow. Fountains of girl goo. An ocean washing over them both. Tabitha swore she was soaking her brother. The bed. Her peak felt different somehow. Even better than ever before. The ecstasy burst right off the top of her head.

Michael's own liquid heat filled his sister's pussy to bursting. Tabitha swore there could be no more, yet it kept coming. A tsunami that picked her up and carried her away. Wave after wave of indescribable bliss. His fertility overflowed her pussy. Pushed past her cervix. Battered her womb.

"I love my baby sister," Michael said, over and over. "I love you so much."

Finally, the two siblings disentangled. They looked down at each other, sticky with cum and sweat and started to laugh.

"Wow," Tabitha said.

"That was incredible, Tabby Cat," Michael said, "Clearly I've been underestimating my pretty kitty."

For a reason she couldn't explain in the moment, Tabitha leaned over and kissed her brother right on the mouth. They'd done almost everything, but never crossed that line. The kiss felt far more erotic, dangerous, than anything they'd done to each other before.

It felt right.

*

After that day, though, Tabitha felt off. Just little things. She told herself it was the intensity of the orgasm that she and Michael had shared. He had broken her brain.

But the strangeness stayed with her. She started struggling to concentrate in classes. Her stomach felt slightly sour, as well. Then her period decided to pass on its monthly visit. Just never bothered to show up. And then Tabitha really did feel sick to her stomach.

When she was able to stop throwing up, she went out and bought a pregnancy test. As if she didn't already know. Another month went by. Another missed period. She was sure she was starting to show.

Then one day Hope caught her crying in the bathroom. This whole thing with Michael, it had changed all of them. A few months ago, Hope probably would have told her to stop sobbing or to "grow up." Now, her eldest sister rushed in, held Tabitha close, and asked what was wrong.

"Is it Michael?" Hope asked, "Did he do something to you?"

"No," Tabitha said, "Yes. Oh God."

Hope walked her down to the living room. Chastity was already sitting on the couch. It felt strange for them to all be together fully clothed. What a weird world I'm living in. Tabitha sat down. She eyed her older sisters nervously.

"It's just the three of us," Hope said, "Michael's at class and Mom's at work. Whatever you say, it never has to leave this room. So, whenever you're ready."

"I'm pregnant," Tabitha said, the words spilling out of her. Like a confession in a bad police drama.

"I know," Chastity said. The two girls looked at their blonde sister with surprise. "I don't know how. I just do. Sister's intuition. I figured you'd say when you were ready." Chastity had changed, too. She'd gone from merciless enemy to unyielding ally. Her toughness something to be treasured rather than feared.

Tabitha knew that Hope would always comfort her, but Chastity would kill for her. It made for an incredibly comforting combination. I'm such a lucky girl, Tabitha thought.

"What happened?" Hope asked, genuinely concerned. She reached across and stroked Tabitha's hand.

"I don't know," Tabitha said and started to sniffle, "I followed the chart and everything."

"Oh, I know you did honey," Hope said, "I know someone at school. They can fix this."

"No!" Tabitha pushed her sister away. "I can't. I won't."

"OK," Hope said, "Of course."

The three of them sat in the living room and cried together. Hope hugged her baby sister tight and told her, "It'll be fine. I promise." She said it over and over. As if wishing it to be true.

"Yes," Chastity said, "We'll work this out together. Like always."

*

After they both walked Tabitha back to her room, Chastity pulled her older sister aside. "We have to help her."

"No shit," Hope said, "If Mom finds out, she'll blame Tabitha. You know she will. She'll say Tabby read the calendar wrong or, worse, that she did this on purpose. Mom - family means the world to her. But this? It's too much. We'll be lucky if she lets us say goodbye before throwing our baby sister out on her ass."

Chastity flopped down in the hallway. Buried her head in her hands. "Family," she said, "Yeah..." Then suddenly she looked up at her sister and smiled. "I have a plan," she said, "But you'll probably think it's nuts."

Hope listened to what her sibling had to say, then nodded. "You're right. It's insane. And that's the best thing about it."

*

The next day, after they were sure Mom and Tabitha were gone, Chastity and Hope cornered Michael in the kitchen. He was eating a bowl of cereal.

"You're going to take a break," Chastity said.

"From what?"

"You know."

"Wait, seriously?" Michael asked, "I don't know if I can."

"You will," Chastity said, she leaned over Michael, putting her arm right by his head. The message was clear.

"I promise there's a reward for you at the end," Hope said, "But if you care about us at all, you'll stop."

"So, go back to rubbing?" Michael asked.

"No," Chastity said, "None of it. Full on celibacy. You so much as touch your dick and I swear to God I'll cut the damn thing off. You got it?"

Michael stared from one sister to another. He gulped and nodded.

Hope watched him as he walked away. "Jeez, if we had thought to do that six months ago we wouldn't be in this mess."

*

Two weeks went by. Chastity had expected Michael to struggle, but she couldn't believe how hard it was for her to quit completely. She'd gotten so used to his cock. She almost broke a few times. Maybe just oral, she told herself. But no. She had to stay strong for her sisters.

They chose an auspicious day in many ways. Tabitha had her first doctor's appointment and Mary was out for dinner with a church group. They would have hours to themselves.

Chastity agreed to take the lead. She led Michael down to the living room and sat him down on the couch. Hope took his left hand. Chastity held his right. The abstinence really had an effect on their little brother. He was practically shaking just from their touch.

"I was going to give you a whole speech. Kind of let you in easy. But the truth is I think it's far kinder to come out and tell you," Chastity said. Michael looked from sister to sister. Eyes wide with fear.

"Tabitha's pregnant," Chastity said.

"Oh fuck!" Michael said.

"Pretty much."

"What happened?" Michael asked, "Did we screw up the calendar or..."

"I wish I knew," Chastity said, "But your sister swears she followed it and she's pretty damn smart. Maybe the rhythm method isn't as foolproof as Mom thought. Or maybe we did the days wrong? Who knows?"

"Is she going to...?"

"She wants to keep it and we support that."

"Yes," Michael said, "Me too." Chastity couldn't help but feel warm in her heart for how her brother was handling this.

"Tabitha's at the doctor right now, getting checked out."

"God, Mom's going to freak," Michael said, "She'll disown her. Disown us."

"And that's what we wanted to talk to you about," Hope said, "I don't need to tell you that nothing's more important to Mom than family. After Dad died, she was terrified that we'd grow up. Move away. And she'd lose us all forever. Chastity and I talked and we both agreed that while Mom would never forgive you and Tabby, she'd have a much harder time kicking out all four of us."

"But, only Tabitha is..."

"Right now," Chastity said, "But we're going to fix that. Right now."

Michael's eyes went wide. His sisters stood up together. Chastity took off her shirt. Her pants. Hope did the same.

"The only way to save the family is to make a new one," Chastity said. She reached back and freed her massive breasts. Hope let her little titties out, as well.

Michael looked up at them like they were goddesses. "That's why I had to wait? So you'd both be..."

"Fertile," Hope said, "Yes. And we wanted to make sure you'd be ready, too. Lots of little brother spermies to make lots of little brother babies."

"So let's stop fucking around and get to fucking," Chastity said, "Your big sisters have some eggs they need fertilized and they need it right fucking now."

Michael practically leapt off the couch. He ripped off his shirt and pants. Threw his underwear across the room.

"You seem to be OK with this," Chastity said, leering.

"Oh yeah," Michael said.

"We may have to try multiple times," Hope said.

"I'm willing to make that sacrifice," Michael said.

"That's what we thought," Chastity said. "You're up first, Hope-less."

"Pretty sure I'm about to be Hope-full," Hope said, "So shut your sperm hole, Chas-titty." Michael started to lie down so Hope could get into her favorite position. But instead she surprised him by getting down on all fours, presenting her pussy to him.

"You sure?"

"Works for animals like Chastity," Hope said, "Should be good enough for me."

Michael got down on his knees. His penis was as hard as he'd ever felt it. Like it could smell his sister's waiting womb. Hope wiggled her ass at him.

"Do you want me to warm you up a bit?" Michael asked.

"Oh GOD no," Hope said, "I've been ready to go for two weeks. Get that thing in there and give it to me good."