A cool breeze floated through Mary Wheeler's open window as she lay awake in her otherwise empty bed. She was having trouble sleeping and hoped some fresh air would help clear her mind. It wasn't working.
The day had begun with the revelation that her son, Danny, had been having sex right under her nose, and had only gotten worse from there. She cringed as she remembered the verbal beating she'd given her sister-in-law, Diane, when she learned that not only was Danny fucking his cousin, Christine, but Diane had actually encouraged the relationship. All of that would have been bad enough, if not for the knowledge that her most shameful secret, something she'd tried to bury and deny for decades, was finally out in the open.
She felt like an idiot for the slip-of-tongue that lead to her admitting her sexual attraction to her brother, Ray. She undoubtedly could have come up with a serviceable lie or simply refused to answer, but the truth was that she was sick and tired of keeping her feelings locked up inside.
As soon as the words left her mouth, she braced herself for a torrent of disgust and ridicule, but it never came. Instead, Diane was actually aroused by the thought of her fucking Ray.
The only question that remained was whether she could actually convince herself to go through with it, and that was where things got complicated.
Diane had insisted that it wouldn't be cheating, and technically, she was right. Mary was in an open marriage, after all. Still, she doubted that Tim had been thinking about his brother-in-law when he gave her permission to take other lovers. In hindsight, she wondered there wasn't a tiny sliver of hope that her taboo fantasy might one day be fulfilled when she consented to his request.
Even though she knew that Tim slept with other women when he went into the city for business, they never talked about it. Part of their agreement was that he would keep that part of his life completely separate from his family. What she knew for sure was that whenever Tim returned from a long business trip, the first thing did was take her upstairs and fuck her like a man possessed. Whenever she was feeling jealous or lonely, she tried to remember that whatever part of her husband she was sharing with those other women was always paid back to her with interest when he came home.
She knew that Diane didn't approve of their arrangement, but the truth was that it worked for them. Sleeping with Ray would be something entirely different, though. She wouldn't be having sex with some anonymous man that Tim would never have to meet or engage with. It would be happening quite literally in their backyard.
As thrilling as the idea of fucking her brother was, she knew that if she actually went through with it, she wouldn't be able to look her husband in the eyes ever again. She'd spent the better part of twenty-five years reminding herself that her incestuous fantasies were sick and wrong. It didn't matter that her nipples stiffened at the thought of his touch, and her pussy tingled with excitement every time she saw him in a swimsuit. Even in the unlikely circumstance that Ray was actually interested, and Tim and Diane gave their consent, she knew she'd never get past the mental blocks she'd spent so long constructing for herself.
It wasn't just concern for Danny that had driven her to anger earlier that afternoon. She was jealous as well. Danny and Christina had thrown caution to the wind and done something they enjoyed, apparently without guilt or regret. Part of her wished she could do the same.
Just as she was resigning herself to the fact that she'd never have the nerve to follow through on her sister-in-law's offer, her mind flashed back to what she'd done with Diane in the back seat of their family car. She remembered the way her fingers went clammy and her pussy throbbed when Diane pulled down her pants, exposing herself to Mary's excited gaze.
Something about seeing Diane's lewd display woke something within her that wouldn't be denied. It wasn't that her inhibitions had disappeared. Far from it. Her brain was screaming at her the whole time, reminding her how slutty she was being, but for once, it didn't seem to matter. In the moment, that 'other' self had been in complete control, leaving Mary with no choice but to give in to the throbbing desire building between her legs.
All they'd done was masturbate, but Mary knew she'd have done more if Diane had asked. The thought frightened and thrilled her in equal measure. She'd always loved the way Tim took control when they made love. There was something so intensely erotic about completely giving herself over to him and his desire, feeling objectified and loved in equal measure. She never imagined that her sister-in-law could make her feel the same way.
Her heart thumped in excitement as she remembered their encounter, and again found herself wondering whether her fantasies might actually become a reality. She certainly wouldn't be able to do it alone, but if Diane gave her the necessary push over the edge, she might have a hard time saying no.
She allowed herself to imagine what it would actually be like to join her brother and sister-in-law in bed. She wondered if Diane was serious when she said that she wanted to eat Ray's cum from her pussy. Never in her wildest fantasies would she think of something so nasty, but she couldn't ignore the tight ball of excitement that formed in the pit of her stomach as she pictured Diane licking between her legs.
Unable to ignore her arousal any longer, one of Mary's hands traversed her round tummy and gently rubbed the furrow of her cunt through her silky nightgown. Her other hand naturally went up to cup and squeeze one of her large breasts.
As she gently toyed with herself, she imagined Ray's naked body. When they were young, she'd listened in on him countless times while he masturbated, but she'd never been able to work up the courage to try to get a glimpse. Even though she'd never managed to see him in the buff, she felt certain that his cock would be wonderful and fit perfectly inside of her.
She imagined kneeling between his legs and lapping hungrily at his cock and gently sucking on each of his heavy testicles before taking him into her mouth. Would Diane join her? She wondered what it would be like to share a man's cock with another woman. An involuntary spasm of pleasure shot through her as she thought about giving Diane a deep tongue-filled kiss with their mouths on both sides of Ray's cock.
As the filthy images ran through her mind, Mary hiked her nightgown up around her waist and pushed her wet panties around her ankles, desperate to remove the silky barrier between her fingers and her hot, swollen cunt.
Soon she was masturbating in earnest, shoving her middle and index finger in and out of herself as she imagined her handsome brother kneeling between her legs and fucking the shit out of her. In her fantasy, it was Diane's hand that was pinching and pulling on her thick, brown nipples, sending her lust into the stratosphere.
She'd masturbated countless times while thinking about her brother, but this was the first time that Diane had ever played into her fantasies. Generally speaking, Mary had never had any sexual interest in women, but there was something about the idea of Diane being there with them, taking full advantage of the situation that she found incredibly erotic.
The heat between her legs was building to the breaking point as she alternated between fingering herself and rubbing quick circles around her engorged clit. She could feel a powerful orgasm begin to build deep in her gut, but before it had the chance to take hold, she was distracted by the sound of footsteps outside. She knew that it must be Christina, coming to give Danny another late night visit. Her suspicions were confirmed when she heard his bedroom window open, then shut behind her.
In her overexcited state, she couldn't help but imagine what the two of them would be doing together down there. She pictured them locked in a lover's embrace, shuddering at the strange mental image. Despite her reluctant acceptance of the situation, it was still hard to believe that her son and niece were having sex with each other just two floors below.
She attempted to ignore the distraction and finish herself off, but to no avail. Every time she closed her eyes and tried to think of Ray, she found her thoughts drifting back to Danny and Christina.
Rather than dampening her already considerable arousal, thinking about the two of them having sex only made her more excited. To her immense frustration, every time she pictured Ray's face in her mind, she found it naturally shifting into Danny's. The more she tried to push those thoughts aside, the more difficult it became.
Oh god. What's wrong with me?
