Anything to make a sale.

That ass.

You live in a house full of gorgeous women, in a world that you've constructed populated with beautiful women. But even you can't take credit for the marvel that is Bethany's ass. As you follow behind her, you can't help but stare at its rhythmic swaying, the **** emphasis that she puts into every step she takes. Her plump rump is poetry in motion, her red thong barely covering the space between her sweet cheeks. The smooth, chocolaty skin is intoxicating and you find yourself extremely jealous of your brother and his unfettered access to this amazingly sexy goddess.

Nor are you the only one paying attention. As you cross the food court, weaving your way between the scattered tables and chairs, heads swivel in your direction but none of them are focused on you. Conversations grind to a halt. Guys wet their lips as they ogle at Bethany, girls shift uncomfortably in their chair as they make comparisons to their own booties...and come up short. It's a bit eerie but Kenny's girlfriend doesn't even seem to notice. It's probably been happening to her most of her life and it natural for her.

Inside the store, one of Bethany's coworkers greets her with a distracted wave, her eyes cast down on her phone. She's a buxom blonde, wearing a bustier that lifts her breasts almost to her chin, lace panties that are practically see-through and a matching set of garters. In normal circumstances, she'd give you an immediate boner. But Bethany's already given you a raging erection and the other employee can't hold a candle to her.

She turns back to you and quirks the corner of her mouth upward. "So what exactly are you looking for today?" You sense a subtle shift in her demeanor. At the question, she's no longer a friendly acquaintance, but a beautiful woman turning on her charm to make a sale.

You look around at the store, with its multitude of racks and shelves stuffed with skimpy lingerie and every type of bra and underwear you can imagine. Every hue of the rainbow is represented and, given that up until a week ago you'd never had the courage to even step in a store like this, it's a bit overwhelming and exciting at the same time. "I'm looking for some gifts," you tell Bethany.

One eyebrow raises at this less than helpful answer. "Oh? And who's the lucky girl?"

Not ready to share with your brother's girlfriend that you've been fucking all the women in the family--and that Kenny's been joining in on the friend--you ignore the question and point toward the far corner of the store. "Why don't we start over there?"

Bethany smiles and leads the way. For the next couple of hours, you get a crash course in lingerie--the different types, what body styles they fit best, the kinds of fabric used to construct the outfits and even a tutorial on the clasps and hooks used to hold them together. It's a fascinating tour of a world that you were only tangentially aware of before...but ultimately it's only a secondary goal. Your primary aim is to spend as much time in Bethany's company as possible, letting your closeness work the magic that the Motherboard has provided you.

Small signs indicate her growing arousal: a slight uptake in her breathing; short moments of distraction where she loses her train of thought; a hardening of her nipples, leaving perfectly round circles on the surface of her bra; an even more accentuated swing to her hips as she shows you around the store; quick but distinct glances shot down at your crotch, where your cock is still thick and hard.

By the time you circle back to where you've started, you've gathered a collection of lingerie of varying types and styles. Bethany sets them down on a nearby counter and asks, "So what do you think? Have you decided on which one you'd like to give to your girl?"

You rub your chin, trying to give an impression of indecision. In reality, you've already made your selections but you don't want this time with Bethany to end quite yet.

"I don't know," you mutter. You lift up a frilly piece of cloth and hold it in front of you like you're trying to picture it on some imaginary girl. Turning it every which way, you continue to play your little game, letting your beautiful companion watch as you pretend to try to make a decision. You heave a dramatic sigh. "I guess I'm still struggling to really see what these would look like on a person. Would you be willing to try them on for me, maybe model them a little bit so I can make an informed opinion?'

For a second, suspicion flares behind Bethany's dark eyes but it's quickly smothered by a combination of growing lust and professional desire to make a sale. She shakes her head, her wild afro shaking like a nest of wild snakes, a smirk dancing on her lips. She leans down until you're face-to-face, barely an inch separating you. Her breasts squeeze together and you have a hard time choosing between looking her in the eyes or at the undeniably delicious cleavage she's putting on display. In a quiet whisper, she says, "We're really not supposed to do anything like that. I could get in trouble."

You tilt your head and grin right back at her, trusting in the foundation you've set with her. "Well, you look like a girl that enjoys a little bit of trouble. Am I right?"

She gives a low, throaty giggle but doesn't answer directly. Instead, she takes a short walk over to where her coworker is still intent on her phone's screen and murmurs something quietly in her ear. The blond nods without looking up and Bethany bounces back to you in her high heels, grabs you by the hand and drags you back to the changing rooms. Four booths stand in a row with a curtain hanging across the entrance to each. Each one contains hooks to hang the outfits, mirrors to check how they look and benches to sit on. A couple of comfy chairs are placed in the outer area, where boyfriends or spouses can wait while their significant others try lingerie on.

Your brother's girlfriend leads you to one of the chairs and as you sit down, she closes the outer door and spins the lock until you hear a click. With a wicked, naughty gleam in her eyes, she carries your selection into the closest booth, glances back at you with an unreadable expression and closes the curtain behind her.

Less than a minute later, Bethany steps from the dressing room wearing a pure white, lace babydoll, with her lips pursed in a sultry moue. Your eyes widen at the sight, her dark skin contrasting perfectly with the ivory color of the lingerie as she struts closer. Other than the cups supporting her tits--which sports an intricate design to draw your eyes right into the scandalously low decolletage--the rest of the fabric is transparent, allowing you to see every inch of her belly and back as she spins in a slow circle, the fur-lined hem rising higher as she does. When she comes to a stop, she immediately floats into a relaxed pose that accentuates all the best features of the lingerie. Your jaw clicks shut--and you hadn't even realized it had dropped.

Damn, this girl sure knows how to wear lingerie, you think, your pulse settling into a rapid, forceful beat.

Without thinking, you reach up and place your hand high on her waist, trapping the smooth fabric between yourself and her body. "So soft," you say, rubbing a tiny section in amazement. Bethany tenses under your touch and for a second, you worry you've moved too fast. But then her hormones and instincts take over and she draws forward, encouraging you to take as much time as you want.

"Absolutely," she agrees. " Plus, being white, it adds a bit of a virginal flair to the outfit, perfect for a girl who may have a bit more innocent nature. It'll help her feel incredibly seductive while at the same time making her man drool at the sight of her. Do you think this will suit your girl?"

You nod and your hand slides lower on her hip, getting tangled in the fluffy hem. "Yeah, Abby will love it."

Bethany's eyes widen but she doesn't pull away. Your fingers have found the mocha skin of her thigh and have continued caressing it lightly. You can feel goosebumps under your fingertips. She clears her throat. "You...you're getting this for your sister?" Her voice only holds a small amount of disbelief. Your plan is working nicely.

"Yes," you reply with a smile. "Why? Don't you think she'll look fabulous in this?"

At your question, her eyes shut briefly and you can tell her mind is drawing a picture of your baby sister wearing such an erotic, sexy babydoll and a low moan erupts from her in the affirmative. Her knees tremble a little bit as her imagination takes hold...but she's not quite that far gone yet and her eyes snap back open. Looking abashed and as unsure of herself as you've ever seen her, Bethany pulls herself away. "Do you want to see more?"

You let the double entendre float between you for an extended moment, letting it float with unspoken approval. "Please," you say. She expertly spins on her high heels and, giving you a final glance at her perfect derriere, shuts the curtain. You sit back, not even caring which piece she decides to model for you next. You just want more time to pass, to let her passions grow hotter and hotter.

It turns out that she's chosen to wear one of the bra and panties sets that you'd selected, peach in color. The bra is a demi-cup, cut so low that you're surprised you can't see any of her nipple peaking free and made of a satin material that shines nicely against her body. The panties are bikini-cut, with a high hip line and a backside that allows almost of of Bethany's generous ass to poke free. Other girls, without quite so much to show, would have bit more coverage, but not much.

"Would you like to feel this fabric as well?" The question is offered with a professional tone, but you can see lust beginning to radiate from your Bethany, a poorly hidden eagerness to have your hands on her again. She truly desires to be felt up by her boyfriend's brother.

Standing up, you take some time to adjust your erection, not hiding your movement from the brown goddess before you. She bites her lower lips as you place your hands squarely on the cups of her bra, squeezing her sweet titties and not even bothering to try to hide your enjoyment. She lets you grope her for a full two minutes before she backs away, turns around and bends at the waist slightly, offering you a chance to get your hands on her bottom. Silently pleased, you dig even deeper into her lower half, sinking your fingers into her pliant flesh with controlled desire. The mirror from the changing room catches her face as you play with her ass. Her eyes have rolled slightly back in her head and if she's not careful, she's going to draw blood from her lips.

With one last **** squeeze, you let her stand back up. Breathless, she faces you again. "Do you think Abby will like these too?"

"Oh, these aren't for Abby. I was thinking these would be better suited for Lily and Violet."

Bethany doesn't even bat an eye at the mention of the twins. A dreamy look crosses her face and you know another vision of your family members, scantily clad in lingerie, is drifting through her brain. "Okay, we'll have to pick up a second set on the way out then."

You shake your head, letting the devil take hold of your face. "No, one set will be enough."

Bethany stares at you in confusion, until the realization of what you mean hits her, causing a sharp intake of breath and a shudder to run down her entire body. She has a difficult time suppressing her thoughts but manages to stumble back to the changing booth. She raises her hand to pull the curtain across the entrance but you stop her.

"Leave it open this time."

Your suggestion takes hold of her and, without complaint, she complies. She turns her back to you in some semblance of modesty but, with the mirror placed at the back of the changing room, you can see both sides of her body simultaneously anyway. You see her eyes recognize that fact as they catch a glimpse of you in the reflection, pausing at your image. With deliberate movement, you unzip your pants and pull out your hard cock. When she sees your huge shaft, another shudder ripples down her spine and she doesn't object. She understands that you have every intention of masturbating while watching her strip and put on her new outfit, but she's gone too far to stop now.

Bethany unhooks the bra and lets it tumble to the floor, letting her Hershey Kiss-tipped boobs bounce free, before wriggling out of her panties. She quickly pulls an outfit from the pile and expertly steps into the leg holes with her heels and pulls it onto the rest of her body. You only get a couple of strokes in before she steps into the common area.

But if she was hurrying in order to limit the time her sexy body was exposed to you, she needn't have bothered. The next piece of lingerie on the pile was a green mesh teddy and, as she quickly realizes as your eyes travel across her body, it fails to hide much of anything at all. From top to bottom, the threads that have been woven together to form the body suit, are so widely spaced that her nipples are poking completely free. Portions have been cut out on the edges, so the sides of her lean stomach are completely uncovered. There's even a space open right at the bottom, perfect for a nice dick to slip inside without the need for taking the teddy off or ripping the fabric.

You spin a finger in the air and Bethany shimmies around in a circle, her gaze continuously drawn to your cock as you rub it enthusiastically. It's sensual as fuck. You know it's not much different than a girl being completely naked but there's something about lingerie like this that is so hot. Knowing that a girl is willing to wear something as lewd as this for you, knowing that it's worn primarily for your delight and pleasure makes your dick harder than ever.

"And who is this one for?" She asks, already guessing the answer.

"Mama Melanie," you tell her. She nods as if that's the obvious choice. She returns to the dressing room, taking her time and giving you the full spectacle of her changing into the next outfit.

By this time, you've been together for almost three hours and it's almost impossible for her to hide her arousal. As she strips free of the teddy, Bethany silently wiggles to music that only she can hear, putting on a show for your enjoyment. Her ass takes center stage, jiggling with every movement, and she even takes some time when she's completely naked to twerk it in your general direction. You almost burst a nut right there, but you know that the finale is almost here anyway and are able to hold fire.

The last piece is not strictly lingerie and Bethany boldly steps out of the room, letting her body do the talking for her. She's wearing a corset, cinched tight to draw attention to her thin waist but flared to emphasize the curves of her hips and breasts. Her tits are pushed up at the top, held in place by a firm shelf almost as if they are being served up for your personal enjoyment. Her bottom is naked, the bottom edge of the corset ending just above her pubic mound. It looks phenomenal on her.

As she turns around one final time, she asks, "What do you think?"

Taking in her full glory, hard dick in one hand, you tell her, "I think Kenny is one lucky guy." She blushes, about to respond but you interrupt her. "Did he tell you of our idea?"

Bethany is thrown for a loop by the question. It must seem like it came out of left field for her, and she doesn't seem to be able to remember any conversation with her boyfriend that would qualify. Most likely because you just made it up on the spot. You beckon her close, still rubbing your thick pole. When she gets close enough, you grab her by the hand and pull her into your lap. Her velvety skin is intoxicating as her ass brushes against your cock and you wrap your arms around her to prevent her from running away. But she doesn't seem to want to; instead, she settles in, leaning against you and letting her ask cheeks wrap around your cock.

You continue in a low voice. "He told me all about your anniversary date, how you two fucked all night long, like wild animals. And you know what he told me?" A slight shake of her head as your hand move to her ripe melons. You tweak her nipples between your steady fingers. "He said you're too much woman for a single man, that he needed someone to help him so that you didn't wear him out completely. Someone to help keep you well-fucked and happy." Your dick surges deeper into her ass, like a foot-long hotdog ensconced in a bun. "He thinks that other man should be me. You think it's a good idea too, I can tell."

You doubt the added suggestion was even necessary, but no need to take any chances. "Yes," she says almost inaudibly. Her hips start to move, sliding your dick through her butt crack with the ease of someone long-practiced with the technique. Soon her whole body is bouncing on your lap and her cries of 'Yes! Yes! Yes!' are easily loud enough to be heard through the locked door. Any resistance she had toward you has finally broken. She truly wants to have both you and your brother as her boyfriends.

"You'd love to play with two juicy dicks, wouldn't you? I bet you could handle a double handjob no problem, playing with both our cocks until we spray our hot white cum all over your pretty little face." Bethany groaned emphatically, thrusting back against you with even more ****. You crush her brown tits in your hands and push back against her, almost becoming trapped in her backside. "Or maybe you'd like to gag on my dick while Kenny plows your cunt from behind. Or I could take your tight asshole. Kenny said you loved having his dick up your backdoor. I can guarantee you'll like mine even better!"

Bethany's hips jerk wildly and you hit your limit. Jizz rushes from your balls, down your shaft and out from your tip like a fire hose. Cum splatters on the back of the corset, each wild shot leaving an indelible mark on the outfit and forming drips that tumble down on the upper slopes of her cheeks. It takes a long time before you're finished releasing your load and you know that the corset is never going to be able to be recovered, even with a thorough cleaning. There's just to much semen.

Panting heavily, your new girlfriend climbs to her feet, an impressive feat considering the length of her heels and the wobbliness of her legs. She grabs the original babydoll and wipes up as much cum from her booty as she can, ruining another completely good piece of lingerie because of your fun. "This is why the company doesn't like us modeling the lingerie for clients," she admonishes you with a cheeky smile. She sedately returns to her 'uniform,' uncaring of your still-hungry eyes now that she's accepted you as her boyfriend, and you stuff your softening member back inside your pants. Your new girlfriend places the used pieces of lingerie in a bin to be discarded. "We'll need to grab proper sizes of them for your girls anyway."

She unlocks the door and you follow her back into the store, where you find her coworker gawking at the changing rooms, her attention finally dragged away from her phone. Taking Bethany's hand, you both wander through the store, gathering the right lingerie as you go. On a whim, you pick up a few more items: a sheer robe made of teal satin and a set of leather chokers. Always plan ahead, you think.

Bethany gathers them all into a bag and hands it to you with a kiss, your first with her. It's sweet and sensual, the perfect combination. Waving goodbye to your new girlfriend, you head back to your car, trying to figure out how best to tell Kenny that he now needs to share Bethany with you.