Bill entered the house through the garage and started upstairs to the main floor, glad to have finished early his Saturday half-day of work. As always, a few hours on the job seemed longer on a weekend. Hell, six hours of school five days a week sometimes seemed to fly faster.
Now he had the day, and the house, to himself. Bill's parents had gone away for the weekend and his twin sister Meredith would most likely be at a friend's until evening. Bill could get in a few undisturbed hours of music while browsing websites, then shower before going out for the night.
Climbing the steps to the attic, which Dad had finished for bedrooms for the twins, Bill paused at the sound of soft moaning coming from ahead. He had his girlfriend Cindy for more than a year, but his sister never had a boyfriend.
Halfway through their senior year of high school now, no one had taken an interest in Meredith. That bothered Bill, for although the twins might be considered a little nerdy no one could call Meredith ugly. Tall and lithe, falling well short of being bony, Meri grew to have the kind of body some models starve themselves to achieve. With natural country-girl prettiness, Meri needed only enough makeup to enhance her appeal, and she dressed to be in style without seeming pretentious.
The breathless moans continued, some loud. Bill crept up the stairs to see what his twin might be doing and with whom. He'd then leave for a few hours, and learn later how Meri enjoyed losing her virginity.
Meredith's door hung open a little. Unseen, but able to see her bed through the narrow space of the hinged side, Bill stifled a laugh.
Meri lay on the bed, covered to the waist by her blanket with her spread legs bent slightly at the knee. Her small but firm breasts jiggled as her busy hands worked beneath the covers.
When Bill started sneaking downstairs and out of the house for a pizza run, Meredith called, "I know you're there, big brother!"
Bill remained silent and frozen in place.
"You can't hide from me. I can feel you!"
"Uh, sorry, babysis," Bill said, using his pet name for her. She'd been born second by three minutes. "I didn't know you were home and...uhhh..."
"Why don't you come in?"
"Uh, maybe I should..."
"Maybe you should come in instead," Meredith pressed.
Bill returned up the steps and pushed into the room. "Uhhh, hi!" he greeted, smiling though his face felt flush.
"When did you become shy? It's not like we haven't seen each other before."
"Yeah, but not...doing that."
"In case you think you're too smooth," Meredith said, raising up on her elbows, "I've heard you more than once when Cindy's too PMS-y to give you even a hand job."
"That's something I didn't need to know," Bill sighed, his face feeling hotter.
"Somebody's gotta knock your pride down a few pegs. Who better than me? Besides, everybody does it."
"You included, it now seems."
"This isn't my first time. I'm just quieter than you."
"Yeah," Bill said, looking away from his twin's playful gaze.
"Wanna watch, since you already caught me?" Meredith invited.
"That's a bit much, even for me."
Meredith swept aside the covers to reveal herself. To Bill's surprise, she had shaved herself to perfect smoothness; not a hint of stubble remained. For a greater surprise, his twin had a thick cucumber under the blanket with her. Meri's glistening cleft and sheened thighs showed she'd worked herself to readiness for the oversize thing.
"Just plop into my chair," Meredith said, "and enjoy the show."
"I don't think...," Bill started to protest.
"Don't think, big brother, because it always gets you in trouble. Just do; just sit there and watch. I never would've thought it before, but having you catch me and staying to watch turns me on. How 'bout it, big boy?"
Bill laughed with Meri at her poor imitation of Mae West. He sat in the old easy chair opposite the bed.
Meredith laid back, propping her head higher by folding her pillow double. She kept a steady gaze with her twin while kneading her breasts. Her breathing quickened, to next become deeper after she started pinching and tugging her erect nipples. "My boobs are really sensitive," Meri purred. "I can almost make myself cum by stretching my nipples while crossing my legs real tight."
"Maybe get some adjustable nipple clamps," Bill suggested. "They'll hold the pressure tight as you can handle while leaving your hands free."
"Mmm...sounds yummy! I see you still go to all the good pervo websites."
Bill's cock had gotten hard when he first saw his twin playing with herself, and he did a good job hiding it. But now, watching her going at herself fully exposed, he could feel the damp spotting of his continuous flow of precum. Bill had to struggle to not rub the front of his jeans when Meredith began stirring her clit with dashing fingertips. Her other hand tormented a nipple with a roughness Bill would never presume with Cindy. Also in that vein, he dared not try or suggest a lot of things that held him curious.
"Hard yet, big brother?" Meri lilted. "I'm dying to cum for you."
"No need to rush," Bill decided.
"You want me to hold back?"
"Yeah."
"Prick!"
They smiled at each other, and Meri withheld her climax. She had to pause several times when her need to release became too desperate to contain. Meredith's entire pussy shined with her wetness, for her frenzied play had spread her juice all over her vulva and shaved mound.
"Wanna cum now, babysis?" Bill asked after long moments.
"Hell, yeah!" Meri gasped. "Can I?"
"With the cuke. But slip it in slow, then hold it until I say you can fuck yourself with it."
"You are such a prick!"
"I like being the audience of a command performance."
Laughing, Meredith took up the long thick cucumber and swirled one end around her flowing opening. The skin of the nine-or-so-inch vegetable had scores of raised knots of varying sizes. Easily two inches wide at its center, the thing might push Meredith over her edge before she realized it.
Meri started the cucumber into herself. Her cum-hungry pussy seemed to gobble the huge veggie as it continued easily into her.
"Oh, please!" Meri pleaded. "I'm gonna cum before it's all the way in! Please tell me I can!"
"Nope," Bill decided.
"Please, Bill! I can't...!"
"Yes, you can. You will."
"Oooooh...!" Meri squealed, pushing the cucumber past its widest diameter and deeper into herself. "Ohpleeeeez!"
"All the way, babysis," Bill said. "Then hold it there."
The agonized girl got the veggie all the way in without cumming. She lay trembling all over as if she'd been cast naked into a snowstorm. A tear flowed from the corner of one squeezed-shut eye, and her nipples stood high and tight. Sweat beaded on Meri's forehead.
Bill's cock throbbed like it never had before without being soothed. He shifted in his seat, the sight of his twin a prisoner of her own passion a thrill he'd imagined only in fantasies of other girls. The realization of his favorite daydream--with his twin--raised a small and growing dragon of guilt. But Bill reasoned in his lust-enthralled mind he's only watching her masturbate, not fucking her. Meri had invited him; they shared almost everything, after all.
"You can start fucking yourself," Bill allowed. "And cum all you want."
Meredith didn't move, as if she needed to gather herself. Then, raising up on one elbow, she looked straight into her twin's eyes. Something in Meri's seemed definitive, secure. "I want to cum with you holding me," she said, her voice ragged for her chained need. "You hold the cuke while I fuck it."
"Whoa, wait a second!"
"I want to know what it feels like to be fucked even if it's not a real cock inside me. We do everything for each other, and I need you to do this for me."
Bill paused a moment, all the while under his twin's desperate but expectant gaze. Well, it's still not like he'd be fucking her for real, right?
"C'mon," Bill decided.
Holding the vegetable inside herself, Meredith all but sprang from the bed. Straddling her twin's lap, she entwined her fingers behind his neck and pressed her pussy against him, rising a little to let him get hold of the end of the cucumber without touching her.
The twins clung to each other while Meredith slid up and down on the broadness filling her. Thick nectar dribbled over Bill's hand, and the scent of Meri's excitement heightened his. If Meri wasn't his sister, Bill would be fucking her right now six ways to Sunday and heading for a brand new week.
"Hug me tighter," Meredith whispered in Bill's ear, her breath hot. She bounced with short hard thrusts in his lap. "I want to feel what it's like to have a lover."
Bill drew his twin closer, snuggling his face in her dark wavy hair. Meri smelled wonderful, so feminine. The scent of her flowing pussy mingled with the fragrances of her soap and perfume, making Bill swear he'd go mad if he didn't do something more than serve as a living fuck doll.
"Ooooooh!" Meredith squealed when her twin nibbled her neck. Shuddering, she slammed herself into the long broad cucumber.
Cuddling tighter with her twin, Meredith again slammed into the cucumber. Her fluid soaked the front of Bill's pants and drenched his hand, leaving him to wonder if she'd pass out from dehydration before she came. Then, as if jolted by a sudden electric shock, Meredith squeezed him with all she had and raised her feet from the floor. Screaming, she climaxed so hard the spasms of her stretched cloister rocked the cucumber Bill somehow managed to keep holding.
"Oh, God!" Meri screamed, shuddering all over. "Ohhhhhh, Bill!"
Bill kissed across Meri's shoulder while his twin kept cumming all over him with explosive splashes of her nectar. His pants became saturated with what sprayed from around the thickness filling Meri's body, and tears running from her eyes wet his cheek. Meredith went weak in her twin's embrace, and he had to hold her upright. Rather than fear for her state of collapse, Bill found Meri's powerful climax made him want more than ever to fuck her.
"You okay?" Bill asked after his twin's sniffles and whimpers softened.
"Oh, yes," Meri squeaked. "I never...came like that; I never felt anything like it. Everything whited out."
Bill wrapped her with both arms.
