Sister-in-law Helps Out

by SamSlam

Caution: This Erotica Sex Story contains strong sexual content, including Ma/Fa, Drunk/Drugged, Cheating, Wife Watching, Incest, Brother, Sister, InLaws, Group Sex, First, Oral Sex, Anal Sex, Masturbation, Exhibitionism, Voyeurism, .

Desc: Erotica Sex Story: Husband turns to his Sister-in-Law for sexual relief while she helps him overcome his wife's incest-related frigidness.

Even though he's been married for almost a year, Tim is horny most of the time and jacks off in front of his computer quite frequently. He loves his wife. They grew up together, have always been best friends and are compatible in every way, except sex.

Tim has the libido of a healthy 26-year-old male, but unfortunately his wife, Sharon, was raised to believe that sex is dirty and disgusting, something only done as a monthly obligation. It was drilled into her, from the time she was old enough to understand; only tramps and whores enjoy sex.

In every other way Sharon is the perfect wife. They enjoy the same music and movies, they never fight and they love just hanging out together. The sexual hang-ups and inhibitions are so deeply rooted, that after a year of trying to change her, Tim has finally resigned himself to accept who she is and just enjoys her as much as he can during their monthly ritual. His frustration is compounded by the fact that she is beautiful, with a nearly perfect body.

Sharon and Tim dated in high school, and then lost contact when each left town to go to college. They resumed their relationship a couple of years ago when they both became teachers, back in their hometown. They dated for a year and Tim respected Sharon's wish to 'save herself for marriage' naturally assuming things would change after the wedding. Because he can't imagine loving anyone else, Tim has never even considered divorce. He's thought about fucking around, but the opportunity has never presented itself, at least, not the right opportunity.

As a handsome young high school teacher, Tim has his share of female students who have made it obvious they wouldn't say no, but he won't cross that boundary. That doesn't mean their nubile young bodies, with their raging hormones, don't invade his fantasies. He frequently gets himself off, imagining one or more of these sexy 18 year olds sharing his bed. But it's only a fantasy.

Surprisingly, his first real opportunity for some extra marital sex comes unexpectedly from his sister-in-law. He gets his first hint of it at a dinner party, at Sharon's parent's house.

Other than their hang ups about sex, his wife's family is generally okay. Tim and Sharon see them every Sunday at church and then have dinner once a month at their house. The dinner parties usually include Sharon's brother, Paul, and his wife, Rhonda. Paul and Rhonda have been married about two years and neither family has any kids. Not surprising to Tim, given the family's sexual hang-ups.

After dinner, the conversation generally turns to either religion or the declining sexual mores in our society. Rhonda and Tim usually sit quietly while their spouses and their parents passionately agree with each other, citing biblical references from memory as they expand on each other's ideas and pool their narrow-mindedness. For some reason, on this particular night Tim finds himself not wanting to listen to their diatribe. He excuses himself and steps out onto the deck for some air. Their discussion is so intense; they don't even notice his absence.

Standing there, leaning on the railing, Tim sucks air into his lungs as he thinks about Keisha, a beautiful, young 18-year old black student in his senior chemistry class. He closes his eyes and tries to visualize her naked body, imagining dark nipples and guessing whether her pussy is trimmed or natural. His cock stirs as he thinks about her thick lips and how they would feel...

"Mind if I join you?" His thoughts are interrupted as Rhonda steps out on the balcony and lights a cigarette. Tim moves his leg, so his sister-in-law doesn't see the bulge in his pants as they stand beside each other gazing out over the balcony, enjoying the peace and quiet.

"Not at all," he smiles.

"As hung up as they are about anything sexual, it's a wonder they ever had kids," Rhonda says, taking a drag on her cigarette and blowing the smoke out over the railing.

"I know what you mean," he laughs. "I just wish they hadn't instilled so many of their hang ups in their kids," he adds, without meaning to disclose so much.

"You too?" she asks, raising her eyebrows.

"You know, I just meant," he stutters. What did he mean?

"It's okay." She touches his arm. "I understand. Paul's a wonderful man and he treats him like a princess, but sometimes..." Her voice trails off as she shrugs and stamps out her cigarette.

"We'd better get back," she says.

Tim watches her ass sway inside her skirt as she walks ahead of him into the house. He's never thought of his sister-in-law sexually before, but he swears she's adding a little extra swish to her walk today. So her sex life isn't any more exciting than his. Interesting.

Sharon and Tim had long ago fallen into a routine of having their monthly sex after the dinner party at her parent's house. It is perfunctory sex, with no foreplay and no variety. Sharon goes into the bathroom, brushes her teeth and lubricates herself, from a tube. He's already in bed naked, when she crawls under the covers before removing her nightgown. She lies on her back and spreads her legs as he positions himself over her.

With erotic thoughts of his sister-in-law making him hard, he penetrates his wife's artificially lubricated pussy. As always, he's gentle and loving, still hoping for a reaction that never happens. As he feels her warmth envelope him, he mechanically pumps in and out while visualizing the sway of his sister-in-law's firm ass. He has a momentary flash of Rhonda's face, contorted in ecstasy, and her voice urging him to fuck her harder.

"Come on, Tim!" he hears her moan. "Fuck a woman like she needs to be fucked!" He complies with her wishes, slamming his hard cock into his wife's pussy while visualizing his sister-in-law lying under him. He vaguely hears his wife's surprised gasp as his body's urgency takes over and he drives his cock deep into her unsuspecting pussy.

He rocks faster, his chest pressed into his wife's tits and he can't help but think about Rhonda, wondering what her nipples would feel like rubbing against him. He envisions her face and lowers his mouth towards her moist lips. Before he can complete the kiss, his cock explodes, bringing him back to reality. As his hot cum spews into his wife's pussy, he notices the confused look on her face.

"I love you," he whispers as he kisses her tenderly on the lips, before disengaging his spent cock and rolling off of her.

"I love you, too," she sighs as she gets up and goes to the bathroom to shower away any evidence that they actually had sex. This is part of the ritual too, but tonight she forgets to put her nightgown back on and he is treated to the sight of her naked body as she hurries into the bathroom. His cock starts recovering immediately as he wonders how Rhonda's body compares to his wife's. Rhonda is about two years younger and from what he has seen has a killer body. He falls asleep dreaming of his sister-in-law.

Sharon lets the tears run down her cheeks as the water cascades over her body. She hates having to just lie there and not respond to Tim's lovemaking, but it's for his own protection. She can't bring him into her wickedness and curse him too! She loves him too much!

As she lathers soap over her body and his seed runs down her thighs, she continues to cry, remembering that awful night back in college, when she caused herself and her brother Paul to be cursed into damnation.

She had gone to a party with a guy she had been dating. Frustrated by his lack of progress with her sexually, he had bought a powerful sex drug from the campus pharmaceutical expert and slipped the aphrodisiac into her drink.

Paul was studying for a theology test or he'd have been at the party, too. Around midnight Sharon's boyfriend called him.

"Man, I really fucked up, Paul!" the boyfriend said.

"Where's Sharon?" Paul asked immediately, always protective of his sister.

"Man, I was just trying to loosen her up some, you know, melt her defenses a little." Paul, found out later that he had used three times the recommended dosage of the sex powder.

"Where is Sharon?" Paul yelled into the phone.

"She's out of control, man! She's dancing naked in the middle of the common room with all these guys cheering her on."

Paul ran the two blocks from the apartment he shared with his sister, to the frat house. Bursting through the door like a madman, he slammed the boyfriend against the wall, punched his face and kneed his groin, before pulling his naked sister from the room. Grabbing her dress on the way out, he didn't bother looking for her bra, shoes or panties as he led her outside. They stopped beside the house so she could get dressed.

Her drug-induced sexual arousal made it difficult for him to get her dressed. He yelled, begged and bargained with her to put her dress on. Paul was out of his mind, looking at his naked sister. This was so wrong! He kept repeating scripture to himself as he tried to get her to put her dress on.

"He hath uncovered his sister's nakedness; he shall bear his iniquity," he whispered repeatedly as her perfect breasts brushed against him when he tried to get her dress over her head. "He hath uncovered his sister's nakedness..." Sharon is not helping.

"I'm so hot, Paul," Sharon pleads. "Don't make me get dressed," she whines, while running her hands over her breasts and tweaking her hard nipples. "I'm burning up inside" she slurs, while her hands glide over her hips and she thrusts her pussy towards him. "Please make the burning stop."

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