I, Spy Ch. 04

After he filled her up with his load and his cock stopped shooting blanks he grinned down at his big sister and said, "Morning."

Until their mom got home the brother and sister had the entire day to themselves. Since this incestuous relationship had started, that meant fucking and sucking whenever and wherever one of them wanted it. After mom joined the party, they calmed things down a little just so he had something for her but, except to grab food, they hadn't really left the house at all. James assumed today would be no different but Jess had other ideas as she wanted to go out and buy a new bikini or two for the small pool party Emily was throwing this weekend. It was strange, until her best friend had texted her yesterday, Jess hadn't realized how little they'd spoken this summer but then she had been entirely too busy doing other things. Or people as it were. In any case, she was happy she'd get to spend some time with her best friend soon.

Normally, she would have gone out shopping by herself or Emily but she wanted to get her brother's opinion about the new swimwear. As much as she didn't want to admit it, she him to like whatever she wore and look good for him as though he was her boyfriend. James quirked an eyebrow up when she asked and she thought he might say no but he just said "Okay." That made her grin like a blushing schoolgirl and kiss her brother on the cheek.

They decided not to go to the closest mall because, even if they'd never kiss or hold hands in public, they wanted to reduce the chances that they'd run into someone they knew. The longer drive did give them a reason to hold each other's hands as James drove. It just felt...nice to be near each other and touching, even in a nonsexual way.

By some unspoken agreement, they didn't reach out for each other after they got out of the car and headed into the mall. Instead, they walked just close enough so their bare arms could brush together ever so often. Even if they ran into someone who knew them, they wouldn't think anything was out of the ordinary. A quick look at the directory told them where the specialty store was and soon enough they were stepping inside. There were three or four people, mostly girls, inside and a college-aged girl ringing a customer up. After a glance around the store, Jess made her way through the racks.

As she shopped, James's lack of opinion disappointed Jess as he said he liked pretty much anything she picked out. At least until she showed him a crop top style top. The piece didn't reveal too much of her breasts but there was a small cutout in the center bottom which showed off the underside of them. His eyes widened and she knew he was imagining what she'd look like wear it.

"You know, this is a lot more fun for me if you actually reacted to what I picked out," she whispered into his ear.

"Oh, it's just that you've never really cared what I thought before," he said before rubbing her cheek. "Besides, you'd look good in anything in here."

Jess had a stupid grin on her face when she pulled away a little.

"Trust me. I definitely care now. In fact, you're the only person whose opinion I care about. I want to look good for you, and only you."

When she pulled away, the look on her brother's face was like a mixture of awe and happiness, and lust. Heat bloomed in her pussy and she wanted nothing more than to plant a kiss on his lips but it was a bad idea, even in a mostly empty store.

"In that case, I like the last one you picked in red, white, and blue stripes," he said before flicking through the bikinis she had brought back near the fitting rooms. "This one but in red."

The one he picked was a simple triangle bikini that was a little skimpier than any she already owned but not too much skimpier. You know, aside from the barely there string bikini that started their whole affair. The only real distinguishing feature was that it was supposed to be worn with the strings crossing her chest before going around the back of her neck. Nodding, she went to grab one in the color he wanted and when she came back, he had a new bikini in his hands.

This new one was a crocheted halter top in a very light purple. She never liked this style because she worried that one wrong move would show too much of her breasts or pussy but the weave on this one was pretty tight over her important bits. The only place it wasn't was between her breasts where small holes were woven into the part holding the two halves together revealing just a little of the insides of her curves.

"Okay, gimmie a second," she said as she plucked the piece from his hands with a flush growing on her face before disappearing into the fitting room hallway.

James had no idea what he was doing here with his sister. The last time they'd gone shopping together was before high school when their mom wasn't comfortable enough to let them roam around in the mall by themselves. Even with his ex, they didn't spend too much time in each store. The only reason why he agreed to come was because he wanted to spend time with her no matter what it was. That's why he hadn't given his opinion about what she picked out. Besides, what he'd said was true. She'd look good in anything in the store.

A few minutes or so later, he heard his sister calling him from the hallway so he stepped back and his jaw almost dropped. It hadn't been that long since--a month or so actually--he'd seen her in a swimsuit but that had been back when she was driving him crazy with her teasing. His brain couldn't comprehend that slutty bikini she wore, only the need to fuck his sister. Now though, he could appreciate a swimsuit on his sister's athletic body.

She put on the second bikini he chose. The crossing straps highlighted her cleavage like he imagined they would and when she spun around her entire back was bare but for the four strings of the top. The bottoms revealed most of her firm ass as they hugged them and she stood on her toes to flex and highlight her legs. He couldn't decide if he wanted to bring a hand crashing down on those cheeks or squeeze them more.

"Perfect," he said.

She grinned then disappeared into the booth. Less than a minute later, she came out in the first one he picked. Even though this suit covered up more of her skin, and breasts, than the other one, the glimpse of the underside of her breasts it provided had his cock throbbing.

"Even better."

She grinned then disappeared into the booth again before coming out in the crochet suit. He'd seen these things online but never in real life and it looked even better in person. In the harsh light of the store, the skin between her breasts looked practically uncovered thanks to the holes in the suit. Though the weave was thick enough over her breasts to not show anything, it wasn't thick enough to hide the impression of her hard nipples pressing against the top.

"Wow."

"That's what a girl likes to hear, and see," she said as she flicked her eyes down.

James didn't have to down at his shorts to know what she saw. He could feel his hardening cock pressing against his shorts. They were lucky she called him back here or he'd be giving everyone in the store a free show. As it was, the only person he cared about was getting the show. The problem being that this should would make for an awkward exit from the store and mall and there was little chance it'd go down with visions of his sister in these three bikinis fresh in his mind.

"Do you want your big sis take care of that for you?"

She might have meant it in a teasing way but her breathy voice and heaving chest said otherwise. His sister wanted it as much as he did. A quick glance back into the main part of the store told him the clerk was helping out a customer. Without a second thought he stepped forward, spun his sister around, and pushed her inside the booth for a fourth time, only this time she wouldn't be alone.

"We shouldn't be doing this in public," he murmured when they were inside.

If his sister had heard him, her actions said didn't care as she grabbed his cock through the outside of his shorts. It wasn't that he didn't want this. It wasn't even that he was afraid of getting caught out in public by strangers. It was the terror of being caught by someone they knew, by someone who knew them. As amazing as this summer had been, they'd been safe and secure in their home. It would take one bit of bad luck out in public for everything to come crashing down. Still...

Lust overwhelmed any concerns James had and he reached up to grab his sister's tits. The crocheted top felt like it looked, rough and soft at the same time. The only bad thing about it was the thickness made it hard to feel her actual flesh. That didn't stop his sister from letting out a soft moan as he squeezed though.

"Is this what you want?" he whispered. "Do you want to get caught by someone? Do you want the world to know that you're fucking your brother? That no one else can make you cum like he can?"

Biting her ear lobe, she moaned a little louder than before. Too loud.

"You're too loud. Good thing your baby brother has a way to shut you up."

James didn't have to say another word for his sister to begin undoing his shorts. If he wasn't almost as hard as a rock then she might have gotten away with just unzipping his shorts but she had to pull them down from his hips to release his cock. Without another word, she bent over and took his cock into her mouth, making it his turn to fight off letting out a too loud groan. With gritted teeth, he slid his fingers through his sister's hair and gripped her head.

He set a slow pace for his sister's mouth, not wanting the sound of the blowjob to grow loud. That didn't mean it didn't feel good though because nothing could really compare to pushing into his sister's tight throat. Like almost every other blowjob she gave him, her tongue lapped at his balls when he just about pressed them up against her chin and it swirled around the tip when he pulled her face back. Just because her actions were familiar didn't make them any less electric.

As much as he wanted to keep this activity quiet, he couldn't help but speed up the movement of his hands and introduce a gentle thrusting of his hips. The thrill of this had his balls churning far sooner than they usually would be. The need to blow his load down his sister's throat began to overwhelm him and he didn't care about the growing sound of wet penetration caused by the fat head of his cock pushing into her throat.

Their eyes hadn't left each other since she had taken him into her mouth and there was a growing panic in hers as well as that familiar grimace of on oncoming orgasm. Looking past her head, he saw that she had both hands buried underneath the crocheted bikini bottoms. One was rubbing her clit, the other dipping inside of her cunt again and again at the exact same rhythm of his cock and her throat. The pair of siblings were both quickly approaching the point of no return.

"Um, excuse me?" a woman's voice said from outside the booth. "You're not supposed to have two people in the fitting rooms."

Jess heard the voice questioning them but. She'd lost herself in the familiar feeling of her brother's hard cock on her tongue. She'd spent enough time with it in her mouth after all. The skin was smooth, only broken up by the prominent veins crisscrossing it and with a firmness underneath it all. She could spend hours with her eyes closed just running her tongue up and down his shaft, and she tried to do it but sadly, the longest she'd ever spent was just under an hour before her brother wanted to fuck.

Looking at her brother had its own benefits though. She could see his face break into a grimace as the pleasure he took from one of her holes overwhelmed his concentration as he got closer and closer to blowing his seed into his sister. It was the exact same face he was making right now. That sight, the feeling of his cock in her mouth, and her fingers working her cunt was pushing her close, oh so close, to an orgasm. It wouldn't be long until they both came and that thought only made her cunt grip her fingers even tighter.

When he stopped moving her head back and forth, she figured her brother just wanted her to lick his balls more which she happily obliged. She was also more than happy to finish the job but her brother continued to hold her in place with his cock balls deep in her throat. The growing lack of oxygen made her light headed and her cunt throb hard like it always did when he choked her with his cock. It wouldn't be long before...her brother slowly pulled her head back, letting her breath again until the fat head of his cock popped out of her mouth. She couldn't help but lick at it as it left her mouth. He'd never pulled out so close to cumming before but before she could ask what he wanted he spoke.

"Sorry, my girlfriend's zipper got stuck and I had to help her."

Adrenaline flooded her body as she realized just what was happening. That voice, probably the clerk, she had heard but ignored was outside the fitting room door. That chance of being discovered wasn't the thing that got her heart racing though. Her brother's description of her as his girlfriend was the reason for the fluttering in her chest.

"Yea, sorry. It's just really hard to get down," Jess said. Her brother's purple tinted cock raged right in front of her face, her spit glistening from the harsh light of the store. It bounced to the beat of his heart and clear precum oozed out of his slit, teasing her with its delicious smell. "It won't take long."

"Okay...just hurry up."

"We will," her brother said.

Like every other booth, the door stopped a foot off the ground but went almost to the ceiling, giving the store clerks an easy way to check on if the booth was empty or not while preventing people from peeping inside. It also let the siblings see the clerk linger around their door for a few seconds before walking away.

Instead of having her suck his cock again like she expected, her brother spun her around and had her sit down on the bench in the room. She had no idea what he wanted until he pulled to forward to the edge and crouched down for a moment. As he stood up straight again, he pushed his cock forward, up against her chest and underneath the bikini top. Her eyes widened. They'd never titfucked before and with the way her brother was eyeing her tits hidden behind the crotched bikini it made sense he'd want to.

Even though the top was doing a good job of holding her tits up, she still used her hands to squeeze the flesh together to envelope her brother's shaft. He was too thick and her breasts were too small to do it but it was close and with his length, the tip of his cock just touched her chin every time he pushed forward. She didn't even mind that she couldn't finger herself anymore because the idea of doing something new with her brother was way more thrilling than just getting off, but not by much though.

"Is this what you wanted when you picked this bikini out?" Jess whispered.

"Jesus, yes," James whispered back after he softly groaned.

Her spit coating his cock smoothed his stroking but her dry skin quickly increased the friction. Without a second thought, she opened her mouth and let the drool that had built up from the blowjob pour out and drip down onto her chest. After a few thrusts to coat her chest and his cock, little friction remained and her brother's cock slid smoothly up and down between her tits now.

"That's it baby bro," she whispered. "Fuck your big sister's tits."

Her brother lurched forward and his hands thudded against the wall behind her to hold himself up as his hips picked up the pace. She helped as best she could by rocking back and forth as well. The familiar sharp aroma of her brother tickled her nose as precum poured from his tip. She knew his signs well enough to know she'd be getting her newest favorite treat in the whole world very soon.

As quiet as they tried to be, the siblings couldn't stop the growing sound of wet flesh gliding on wet flesh as James picked up his pace. Neither of them cared. His approaching explosion clouded both their minds.

Jess stared down between her tits, mesmerized by the thrusting of her brother's cock. Precum poured out of the tip on every upstroke. She heard him sucking in air from between gritted teeth somewhere above her so he knew at least to not grunt and groan like he usually did. She had enough presence of mind as well to know that he couldn't just cum all over her because with how much he always shot there'd be no way to hide what had happened in the fitting room. That was one of the few things they hadn't done but she had fantasies of her brother marking her, visually claiming her as his. She understood why though because she loved nothing more than taking her brother's incestuous cum in one of her holes and he loved filling her up. Besides, he'd taken a few photos of his cum leaking out of her ass and cunt which was just another form of marking her.

Speaking of which...

There wasn't really any choice in the matter. With his bucking hips, Jess knew she'd be swallowing her brother's load any second now. She heard him suck in a sharp breath between his teeth and watched as his twitching cock emerged from her cleavage. She'd never seen it up close when it was ready to burst as her brother always had it buried in one of her or their mom's holes but in the flesh it looked almost like an alien creature with its raging purple-red coloring and bulging veins.

"Fuck," he grunted.

Jess watched, mesmerized by her brother's thrusting cock, as he pulled it back and pushed it up between her tits one last time. The slit at the tip opened up and, before she could do anything, she felt something hot on her chin. She quickly scrambled to take his cockhead into her mouth because she knew the buckets of cum her brother always produced. As she swallowed said bucketful of seed, she idly thought that his cum was warmer than she thought it'd be on her face.

"Excuse me," came a voice from outside the booth. "I'm going to insist that you leave the fitting room immediately."

The voice barely overcame the sharp gasps of breath that came from above her that came with every blast of cum threatening to overflow her mouth and spill even more hot cum onto her chin. She didn't even hear her brother's reply as she concentrated on sliding her tongue side to side on the underside of the twitching cock in her mouth. For all the times her brother had cum in her mouth, all of them had been with him buried in her throat which meant a direct shot straight into her stomach. It wasn't until this moment as she barely kept pace swallowing the voluminous shots of cum in her mouth that she understood just how much of it her brother's balls produced.

Eventually, after what felt like an eternity, she could actually keep her mouth empty for more than a second as each shot produced less and less cum. It took a bit more time for his cock stopped twitching and she loved every second of feeling it move in her mouth. Even though she had swallowed all of his thick seed, she could still savor its pungency on her tongue. She wanted more. It would have to wait though. Even with her obsession with her brother, his cock, and his cum, they couldn't spend any longer in the fitting room because she knew from experience that it'd take too long for her brother to cum again. Besides, he had already tucked the object of her infatuation away, though it still made quite the impression beneath his shorts.

Like a gentleman, he helped her up to her feet as she grinned up at her little brother while licking her lips. He ran a broad thumb across her chin, scooping up that initial shot of his cum and feeding it to her. Letting her tongue curl around the finger, she sucked up the last bit of his savory seed and swallowed while never once taking her eyes off his. She wanted her brother to see just how much of a cumslut she was for him.