Compelled To Breed Pt 03

The next day, Isabel went on her tour of Columbia University. She heard the droning of the tour guide and watched the "normal" kids alongside her with fascination. None of them were thinking about the overwhelming instinct to fuck and make a baby. She took a long breath and followed the crowd ambling along the corridors of the university.

Whatever had gotten into her and her brother Mark's systems over the past two nights had longer effects. Isabel felt a powerful urge to create a safe space and to cling to Mark. She was no dummy, she knew this was a nesting instinct that expecting mothers felt. It was too soon for her to be biologically pregnant, that process, according to the textbooks in school, could take days after insemination.

Insemination, that clinical term sent a shiver through her loins. It was now a muscle memory the feel of all the times last night and this morning Mark had cum inside her. That's right, they'd fucked all night and started again this morning. They were young, but in the space of twelve hours he'd dropped his load in her fertile womb more than a half dozen times.

The lingering effect on Mark seemed different. Where she had shifted into a more serene, motherly mode, he was antsy and distracted. Except when they were fucking. Then he was focused and... wild. He nipped at her with his teeth and gripped her with his fingertips. It was feral and when they were done he seemed to have only a short respite before the need began to amp back up - though nowhere near as bad as the night before.

After a short time she realized she was getting nothing from this tour and silently exited, flowing back into the streets of Manhattan.

Were these instincts to be trusted? Or should she fight against them as artificial, as some kind of emotional invasion that she needed to shed, in order to protect herself. Even as her civilized mind considered the situation, she fantasized about getting pregnant and feeling her belly swell. It even made her horny.

Her phone buzzed and she saw a text from cousin Linda:

Need to come back to the apartment - just FYI.

Isabel's heart sank. Slowly she made her way back, her disappointment increasing the closer she got. With Linda (and presumably her husband Grant) back there would be no opportunity for her and Mark to continue exploring their situation.

Situation?

She thought,

I just want to fuck some more.

Isabel didn't even blush at the thought.

She texted Mark the bad news. Despite all he was experiencing, he'd insisted on going to work. Isabel didn't think that was the best call, but he'd seemed controlled enough this morning that she didn't think he'd be called into HR for harassment... she hoped.

He texted back:

But I need to be with you.

Then he texted:

What if I left now and met you at the apartment? Would we have time to

- and here he inserted the eggplant and peach emojis.

Isabel texted back:

I'm almost there. Can't wait ;

She got to the apartment and stripped down before jumping in the shower. Isabel wanted to be fresh for Mark when he arrived. She shaved and trimmed where needed, washed her hair and went about drying herself off. She thought long and hard about what to wear - or not wear when he came home. Ultimately she saw that Linda had a very short and sheer robe hanging on the back of the bathroom door. It was cream colored and only came to about her mid thigh.

Isabel decided to put on her skimpiest panties - though it was still pretty normal, she had not packed for any of this and honestly, she didn't own any sexy underwear. With a feeling of anticipation she heard the front door open and forced herself to slowly walk out to the living room.

Of course it was Linda.

"Oh!" The non-word just burst from Isabel's mouth upon seeing her cousin.

"Hey Isabel," Linda said, then did a double-take. "Is that my robe?"

"Um yeah. Sorry, just heard the door and wanted to throw something on. You know, make sure you weren't an intruder."

Linda dropped her bag and tossed her coat over a chair. She was tall for a woman, just a shade under six foot, with curves everywhere. Linda was what people meant when they said: statuesque blonde. "Sorry to break in on your city adventure," she said as she walked purposefully to the bathroom just off the kitchen.

She saw Linda's eyes were puffy and red from crying. Isabel said, "Lyn? Are... are you okay?"

Linda stepped back out from the bathroom with a tissue in her hand. You would not need enhanced horniness senses to read her distress. She said, "Grant and I are done."

"What?"

Linda marched about the room, her hands and arms gesticulating. "It was the fucking basket my mother sent here. You know with the champagne and strawberries.."

Uh yeah.

"How did that..." Isabel started to ask.

"Well I tell him about it, like you know, 'can you believe she did that' and he flies off the handle."

"Why?" Isabel said.

Linda flowed into the kitchen and opened the fridge, leaning in for something. "Well it turns out he doesn't want kids. Ever." She shut the door hard and stood back up with the champagne bottle in hand.

"Oh." Isabel sat down on the couch, thinking about the likelihood that she was already knocked up herself. It made her feel bad for Linda. Her cousin was in her late twenties, still young, but Isabel knew how women's "clock" could pressure them at that age.

"I'm cutting out a lot of back and forth bullshit," she said. "And I'm sorry to just vomit this out at you. God." Linda took down a wine glass and began undoing the wrapper on the champagne bottle. "How have the college tours been going?"

"Linda," Isabel waved away the change of subject. "I am so sorry that happened. You had no idea Grant felt that way?"

"Not only did I have no idea," she said, "But the prick told me the opposite when I asked him point blank."

"He said he wanted kids?"

"He did. Before we got married I told him I wanted kids - you know down the line - and he said 'me too', down the line. Fucking down the line to him meant 'negotiable.' And you know what? You can change your mind. That happens, but he tried to put it all on me like the only way I'd marry him is if he said yes. He says I coerced him. What the actual fuck."

During her tirade she'd popped open the bottle and poured a glass. As Isabel watched her gulping the bubbly down she wondered if it was spiked too. It couldn't be, it was wrapped and everything.

Glass empty, Linda filled it back up. "The most pathetic part... I was going to tell him I stopped taking birth control if he wanted to start trying this trip."

Isabel stood up and walked over to her. She gently moved into her cousin's arms, encircling her in a tight embrace. She felt Linda's full breasts and shapely hips, moulded to their softness. "You need a hug," she said.

Linda put the glass down and folded her arms around Isabel, gripping her tightly and resting her face on the top of Isabel's damp head. "I do and thank you."

After a few moments Linda looked at Isabel and said, "I am sorry for intruding on your fun, but I am so glad you are here."

The front door opened and Mark stepped in, his face incapable of hiding his sudden and crushing disappointment. Isabel knew she was being paranoid, but would Linda start to put it together? How could she even suspect?

***

The first thought Mark had upon seeing Isabel in a skimpy robe hugging Linda, was that she'd told their cousin what happened and he was in deep shit for what they'd done.

I had sex with my kid sister. I deserve what I get,

he thought.

Going to work had been a mistake. The lingering effect of whatever was in those demonic strawberries left him hyper aware of every woman in sight. The subway was bad enough, but the office was a nightmare. Any woman that acknowledged him seemed to set off a mental sub program to assess their sexual fitness. Age did not really matter and neither did past standards of attractiveness.

He had a perpetual hardon and spent most of his mental energy keeping himself in check. The fact that he even could keep himself in check meant the effects were wearing off. With not a little bit of shame, he recalled how he'd nearly grappled Isabel the night before. Only because she had understood from her own experience what he was going through and how to help him (and that she was willing to help him!) had he made it through.

Knowing he would come back to Isabel was a useful weapon in his mental arsenal to keep himself from becoming an HR violation at work. That's why the text that cousin Linda was coming home early sent him into a panic. Mark could call it a need or a compulsion all he liked, but the simple truth was that he needed to fuck and he needed to cum deep in a willing pussy.

Standing and seeing Isabel's lithe form in that sheer and short robe prodded his animal need, but Linda's clearly upset face counteracted his base instincts with very potent guilt.

What have we done?

When they broke their embrace, Linda sniffed and smiled at him. She was upset, but not at him or Isabel. Something else was at play and it took his horned-up brain a moment to catch on.

"Oh my god Mark, look at you," Linda said, ogling him. "I can barely recognize you." She came over and hugged him. He suppressed a groan of pleasure at the contact with her body.

Over her shoulder he looked at Isabel and mouthed, What's going on?

Isabel waved him off and shook her head. Linda broke the hug and then Mark was able to get a good look at her. She was almost thirty, very tall, with honey-touched blonde hair. She was fit, but curvy. She still had that lop-sided smile that had turned his insides to mush when they were younger. He'd always had a crush on her, especially when they spent summers at her parent's lake house. Linda in a bikini fueled plenty of his fantasies growing up.

"But," Linda said, "Why aren't you at work?"

"Oh well, I took off early to spend time with Issy."

"Sweat. Look at me getting in the way," Linda said.

Mark said. "How could you be in the way? Where's Grant?"

This seemed to trigger something and Isabel made a face. Linda went back to her glass of champagne and started drinking. She told Mark about Grant and her, and when she got to the part about her wanting to start trying right away, it hit him like a drug.

No birth control?

He caught Isabel watching him with a mysterious smile. Mark had trouble focusing between their vulnerable cousin driving him wild and his sister, who'd already let him cum in her unprotected womb, looking like she had a naughty secret.

With a ragged breath he said he was going to get out of his work clothes and went into the guest room. He stripped and changed into shorts and a t-shirt. Then he splashed his face with cold water and brushed his teeth before heading back out.

Linda was still drinking champagne, but seated with her legs folded underneath her in the EZ chair. Isabel had covered herself in a big blanket on the couch. When she saw him enter she waved him over and pulled back the blanket for him. "Come keep me warm," she announced.

Mark saw the barest hint of inquiry cross Linda's face at this. This must seem a little odd for a grown brother and sister, but not too strange. Out of sight under the covers his hand automatically slid between her thighs and nestled into the warmth near her crotch. He felt a shiver as her hand stroked his leg before settling over his cock.

"It's so cool you two stayed so close," Linda said.

Isabel snuggled in tighter and squeezed him through his shorts. She said, "I just want him for his warmth."

"Want me to turn the heat up?"

"No, this is more cozy."

They talked about colleges and how the campuses were all the same and how their spiel about excellence and blah blah blah just never rang genuinely true. Isabel took every opportunity to caress and gently stimulate Mark stealthily under the covers.

Mark did his best to hold her back without it being overtly obvious to their cousin that they were fondling each other under the blanket. He found it hard to concentrate with Isabel's body pressed up against him. The smell of her fresh hair, the smooth silky touch of her skin, the feel of her breathing just made him want to nibble and lick at her neck.

His eyes though, were feasting on Linda's legs and hips and breasts arranged alluringly as she sat opposite them. Oddly, what was really amping him up was when he made eye contact with their cousin. It always lasted a beat longer than was casual, and he sensed a pleasant note of intensity. Linda knew something was happening and it seemed to be turning her on.

Isabel put her head into the crook of his shoulder and neck. Then in full view of Linda she nuzzled at him. He lost himself in that sensation, shutting his eyes.

Just as he was getting worked up beyond the point of caring, Mark heard Linda say, "So how were they?"

He looked up and realized he had zoned out from Isabel ministrations so badly that he missed their cousin getting up and going into the kitchen and returning with the last two chocolate covered strawberries.

Mark started to say something, but Isabel's grip on his cock tightened under the covers so that all he said was "Hrk..."

"Must have been good," Linda said. "Only two left."

"Go for it," Isabel said. "We had some the other day."

Linda came over and held them out. Isabel selected one and ever the gracious host, Linda offered the last berry to Mark. "No thanks," he said.

Linda shrugged and went back to her seat, holding the last strawberry in her long fingers. "I figure these little fuckers caused so much trouble I should at least get to enjoy one of them."

"Linda..." Mark started to say.

"Your mom," Isabel cut him off, "Sent these in the spirit of you having a good time. I can tell you that we've had a great time this week." Then she leaned in and kissed Mark fully on the mouth. She didn't use tongue, but it was far more than a sisterly kiss. Then she turned an eye to Linda and let out a husky, evil laugh.

Linda maybe thought it was a joke, because she laughed uncomfortably at first. She ceremoniously brought the strawberry to her lips. She suckled at the chocolate shell before biting half of it away. "Mmm," she said and hunched to catch the juices that ran out. Then she popped the rest of it in her mouth and jumped up to grab a napkin.

"Issy?" Mark whispered, but stopped when she squeezed his cock hard under the covers.

From there, the conversation ranged from college plans, to reminiscing about the family vacations of their youth. Isabel kept their one last strawberry on a napkin sitting on the coffee table in front of them. It sat large in Mark's mind, his eyes wandering to that dangerous little bud of fruit every time he saw Linda give out a little breath or respond as if the house was getting too hot. She removed her sweater eventually to reveal the silky, armless blouse beneath. She had well muscled arms and he caught more than a little side-boob as she moved. She caressed her legs and hips and sometimes touched her face.

Under the covers Mark felt the warmth of Issy's legs against his own, the tautness of her belly and the madness inducing gentleness of her touch. But then, he smelled the strawberry induced power of Linda's arousal. It's happening, he thought. She's starting to become worked into a heat.

Linda stood up and said, "I'm going to change. Be right back."

When she was gone Isabel turned to him and grabbed the strawberry. "Here."

"You can't be serious?"

"I am. The thought of you fucking her is... incredible."

"Why don't you take it?" He said to her, loving the thought of two women in heat.

She shook her head, "No way - that would be a disaster."

"Why?"

"We'd be at each other. But if you take it, then when it starts, it will be all about you two."

"What about you?" Mark asked.

She smiled wickedly, "I'll come later."

Mark thought about Linda's tall curvy frame and had to take a steadying breath. Do I want to be under the sway of whatever was in those berries again?

Like she could read his mind Isabel said, "This way you'll be able to go all night - for both of us."

Mark grabbed the berry and shoved it in his mouth.

***

Linda stood in her bedroom, staring at her face in the mirror over her dresser, more horny than she'd ever been in her life. The feeling was so intense and mixed with the impossible realization that her marriage was over, it threatened to break her. Her eyes stung as if she were about to cry.

She'd been all manner of angry and pained when she first arrived back at the apartment. It had been an almost out-of-body experience as she vacillated between the dreadful certainty she was about to be divorced to pure denial - how could this happen to me?

Her husband's cool, cutting anger as he explained how she had extorted him emotionally to ensure she could have a child remained fixed in her mind, but sitting with her two cousins seemed to have undercut the prominence of her pain. Now she felt less in-pain and more, aware that this is what she had to do in order to move forward.

Fuck you Grant, but thank you for finally showing your true colors.

The blowout occurred Sunday night. Monday they'd been at a slow burn, and it had taken her that long to arrange a flight back. She'd been going since 6am that morning, but now... now she felt energized somehow. She credited her young cousins and their good energy with that.

They loved each other. Their closeness - well - sometimes Isabel seemed to kiss Mark a little too romantically? That's weird, was there a vibe between them? As they talked, watching them nestle in each other's arms made her mind conjure lude images of them... no, that's unthinkable.

What is wrong with you and why does the thought of your barely eighteen year old cousin fucking her brother make you want to start rubbing your own clit?!

She stripped down and freed up her breasts from their bra. In only her panties she contemplated what to wear. Normally it would be sweats, but she hesitated. Digging in her drawers she noticed that her dildo was sitting on top of her underwear.

First she considered using it on herself. No, not enough time.

Then,

Wait, did I leave it like that?

She could have sworn she always tucked it under her panties. Her mind jumped to Isabel who'd been sleeping in here, but quickly dismissed it. No, she must have been careless. How embarrassing.

Linda found the thin t-shirt fabric pajamas she decided to wear. They clung to her curves and left her belly exposed. Normally she'd never wear this in front of anyone, except Grant, but the thought of teasing Mark (and Isabel), just a little, excited her.

Mark had a crush on her when they were teenagers. She'd caught him looking at her more than once, especially when she was in a bathing suit, but other times as well. She supposed that was normal - for certain she'd never thought much about it and seeing him now (wow) she liked the idea that she could turn him on.

Newly dressed for comfort (and show) she went back to the living room where she caught the tail end of another not-so-sisterly kiss Isabel gave her brother. Then the little ingenue slid aside and opened up the blanket. "Come sit with us!"

Linda's stomach did a little flip and she moved to go next to them, but Isabel angled it so she was sitting between them. Immediately they pressed against her from either side, Isabel hugging into her left side, kissing her cheek and pressing her skinny little frame against hers.

But that was nothing compared to the feeling of Mark's solid presence on her right. The skin of their arms touched and it was electric.

Why am I so turned on?

It must be all of the energy she'd hoped to use making a baby with Grant. God what would Mark think if she said that out loud.