An Experiment in Incest

* * *

"What are you saying, Colleen?"

He asked her the same question over again. Obviously, with him not wanting to feel as if he was the only one perverted, he knew exactly what she was saying. Yet, he wanted and needed to hear her confess her incestuous thoughts.

Leaving her hand there, as if she was placating him, she reached out her hand to pat his hand with her hand. Mark looked down at her hand as if having never noticed her hand before. She had such long fingers and he couldn't help but imagine her long, manicured fingers wrapped around his cock while stroking him in the way that he imagined his wife was stroking her brother in the pool, in the toolshed, and in their parked car. He couldn't help but imagine his sister-in-law stroking him while sucking him in the way that he now imagined his wife stroking her brother while sucking him.

"What I'm saying is, Mark, if I wanted to be alone with you, I'd invent an errand in the way that Claudia and Alec are always needing to go to the hardware store alone," she said. "What I'm saying is if I wanted and needed the privacy to suck your cock, I'd take you out to the toolshed," she said staring at Mark for his reaction to her blowing him. "The toolshed and in a parked car would be the perfect place to suck your cock," she said giving him the eye. "I can only imagine how many times my husband has already ejaculated his lust for his sister in her hand, in her mouth, and in her pussy."

She gave him a hard, silent stare while seemingly waiting for him to come around to her enlightened way of thinking.

"Tell me," said Mark. He looked at her as if he couldn't believe that his wife would blow her brother but not him. "What are you thinking?"

Colleen fell pensive.

"I'm thinking that it was stupid of us not to notice their obvious sexual attraction to one another and their incestuous relationship until now. What I'm thinking is, I wonder how long this has been going on, possibly years," she said staring at Mark. "Now that I've been watching Alec with his sister, extrapolating my thoughts, I wonder if your children aren't your children but are his children."

Horrified by the thought that he may not have fathered his own children, Mark looked at his sister-in-law with horror before looking at Claudia having fun with her brother in the pool. Even worse than him not being his children's biological father was the fact that their children could be products of an incestuous relationship between Alec and his sister. As soon as he thought it, he calmed his fears by denying them. Assuring himself, he believed his children were his and not Alec's.

Nonetheless, even after Colleen verbalized his worst fears, as if imagining her with his hard, hairy cock stretching his sister-in-law's beautiful mouth, he looked at her with lust. As if lost in a sexual fantasy, he stared at Colleen's full, red lips before staring in her green eyes. Unable to help himself from looking, he stared down at the huge impressions that her huge, double D breasts made in her bra and blouse.

For sure, he'd love to get his sister-in-law in the pool and grope her in the way that her husband was groping his wife. He'd love to get his sister-in-law naked in the way that his sister was practically naked and in the way that he had stripped his mother-in-law naked years ago. He'd love to get his sister-in-law in the toolshed and/or in his parked car someplace romantic. He'd love to stick his prick in Colleen's hand, mouth, and pussy in the way that he now imagined her brother sticking his prick in his sister's hand, mouth, and pussy.

"I never thought of that," said Mark rejecting the idea. "I never even considered my children may not be my children but with them looking just like me, I know they're my kids and not his," said Mark. "Nevertheless, I never imagined my wife fucking and sucking her brother in the toolshed or parking somewhere secluded for them to make out and/or have sex." He shot Colleen a look while imagining her sucking his cock in the way that he now imagined his sister sucking her brother's prick. "Claudia isn't like that. She's not a slut and she's definitely not an incestuous whore," he said.

Sorry that he had said that, he wished that he hadn't said what he said for fear that he was calling Colleen a slut and an incestuous whore for even thinking that Claudia and Alec were incestuously intimate. Ignoring his comment, Colleen returned her focused attention to the pool. As if her breasts were his rudders, Alec was swimming around the pool while holding onto his sister's exposed breasts. As if his cock was what propelled his forward motion, he pressed his exposed, erect prick against his sister's exposed, naked ass. Ignoring her husband frolicking with his sister, she stared at her mother-in-law.

"Our mother-in-law doesn't seem to mind getting all wet," said Colleen obvious in her double entendre of Alec and Claudia's mother getting wet. "Seemingly, for an old broad, she gets wet a lot these days," she said looking at Mark. "I only wish that I was as sexually lucky as she seemingly has been," she said giving her brother-in-law the eye before giving him a sexy smile and another naughty look.

Able to see a lot of her MILF of a body, still sexy for an old broad, Mark stared at all he could see of his mother-in-law through her sopping wet clothes while wondering what his sister-in-law meant by that remark. Did she know that he had been sexually intimate with his mother-in-law? It was just the one time when she was drunk but how would she know? Did she know that he had stripped Corrine naked? Did she know that Corrine had sucked his cock?

Maybe, when she was drunk, Corrine told her that she sucked his cock after he stripped her naked. A heavy drinker, she was always drunk and whenever she was drunk, she was horny. Even worse than that, whenever she was drunk, she talked. Making light of a bad situation, doing his best to change the subject by focusing the incestuous, sexual attention on Alec instead of himself, he threw his mother-in-law under the bus.

"As she does every day, she had a lot to drink today. It wouldn't surprise me if she took her son out to the toolshed to suck his cock instead of Claudia," said Mark with a dirty laugh. "She does have a nice body for an old broad."

* * *

Sorry he had said that, why did he say that his mother-in-law had a nice body for an old broad? Unless he had seen her in her bra and panties, which he had, topless and/or naked, which he had too, how would he know that she had a nice body? As if catching him in a lie, Colleen shot her brother-in-law a questioning look. Obviously, revealing his sexual secret, she knew that something had happened between them.

"Pray tell, how would you know that our mother-in-law has a nice body?" She laughed. "Do you know something that I don't know?" Colleen stared at her brother-in-law with curiosity. "You do know something that I don't know, don't you? Pray tell, what dirty, little secret are you keeping about our slutty, drunken mother-in-law?"

Mark looked at his sister-in-law with embarrassment, shame, and remorse mixed with sexual excitement.

"Okay. There was this one time, years ago, when Claudia was away on a business trip and I invited Corrine to the house for dinner," said Mark. "With Claudia not very adventurous when it comes to sex, an understatement, and with her not there, I was horny. Back then, I was always horny and I needed some female companionship, even if it was only her mother," he said pausing. "Especially if it was her mother keeping me company," he said with a dirty laugh.

Colleen gave her brother-in-law a sexy look.

"Don't stop there before getting to the good part. This is getting juicy," she said.

Mark smiled an embarrassed smile at his sister-in-law.

"Having sex with mother-in-law had been my sexual fantasy. To be honest, I was hoping to get her drunk. Being that I had a hot tub back then, willing to get naked with her too, I was hoping to get her naked. I was hoping to have sex with her."

Colleen gave him a delicious smile as if he was about to tell her something really good.

"Did something happen? I know you. Tell me. What happened? Did you have sex with Claudia's mother? Did you fuck her? Did Corrine blow you?"

Mark nodded that he did have sex with her and that she did blow him. Then, he looked away to watch Alec feeling up Claudia while Corrine was still in the pool watching the forbidden, sexual interaction of her children. Sexually exciting to see, he watched Claudia's brother feeling his wife's nearly naked ass. He watched Alec take his sister by the wrist and move her hand beneath the water. Suspecting she was, he wondered if Claudia's was feeling her brother's exposed prick. As if thinking what to say and how to say it before saying it, he looked at his sister-in-law.

"Typically, that night, so many years ago but something I'll never forget, Corrine had too much to drink and was drunk. Typically, that night as I am every night, I was horny. Hoping at the very least to flash her my erect cock while in the hot tub and while she flashed me her ass, tits, and pussy, I was hoping to get her naked. I was hoping to grope her naked body in the hot tub while she groped me," said Mark. "I was hoping to make out with my mother-in-law."

Colleen looked at her brother-in-law with as much curiosity as she looked at him with lust.

"Please, don't stop there, tell me more," said Colleen turning in her chair to face her brother-in-law. "Tell me everything."

* * *

Making herself more comfortable, she leaned back in her chair and parted her knees more. Deliberately exposing her trimmed, brown pussy to her brother-in-law in the way that Claudia was exposing her bushy pussy to her brother, it was obviously that Colleen wasn't wearing panties beneath her loose shorts. He took Colleen exposing her pussy to him as a hint and as his opportunity to expose himself to her. Mark reciprocating her flashing by stealthily brushing his hand against his bathing suit to release his erect cock from the netting and to expose his prick to Colleen in the way that she was exposing her cunt to him.

He stared down at Colleen's pussy in the way that she stared at his exposed cock and testicles. He only wished her breasts were exposed in the way that her pussy was. Having never seen them before, he'd love to see her big tits now. Yet, she was wearing a bra and even though much of her bra was exposed beneath her loose blouse, seeing her bra clad breasts wasn't nearly as sexually exciting as seeing her naked breasts.

"If nothing else, after exposing myself to my mother-in-law, after she left and I was alone again with my bad self, I wanted fodder to masturbate over later. So, thinking nothing of it, I asked her to join me in the hot tub. If nothing else, even if she refused my invitation to get naked and go in the hot tub with me, embarrassed now to admit it, I wanted to expose myself to her," said Mark. "Hoping to tempt her into having sex, I wanted to show her my erect prick. If she wouldn't masturbate me, I thought about masturbating in front of her while she watched."

Colleen looked at her brother-in-law with as much surprise as she looked at him with sexual excitement.

"Oh, you dirty man," said Colleen with a laugh. "You flashed our mother-in-law your cock, didn't you? This is getting good, really good," she said with another laugh before giving him a look of sexual seduction. Sexually teasing him, she felt her breasts and nipples through her blouse and bra before touching herself beneath her shorts. "How come you never flashed me your cock? Maybe I'd like to see your cock too. Maybe I'd like to watch you masturbate yourself. Maybe I'd like to see you cum," she said with a laugh.

Not shy, embarrassed or ashamed after telling her brother-in-law that she'd like to watch him masturbate and cum, she stared at his exposed prick in the way that he continued to stare at her exposed pussy. While she stared at him with sexual seduction, he watched her finger her nipples through her blouse and bra in the way that she watched him fingering the head of his erect cock. Then, masturbating herself in front of him, she rubbed her clit while finger fucking her pussy as he slowly stroked himself in front of his sister-in-law. She looked at him with sexual excitement in the way that he looked at her with forbidden lust.

Tempted to walk over to her and stick his cock in her mouth in front of his wife, her husband, and his mother-in-law, Mark seemed surprised by his sister-in-law's sexual forwardness. He wished he had the courage to touch her and feel her. He wished he had the courage to feel her breasts and finger her nipples through her blouse and bra. Instead, in the way that she continued staring at his exposed prick while she masturbated herself and he masturbated himself, he stared at her big tits before staring at her exposed pussy.

If he hadn't thought about flashing her his cock before, he was obviously flashing his cock to her now while masturbating. If she hadn't thought about flashing her pussy to him before, she was obviously flashing her pussy to him now while masturbating. She unbuttoned the top two buttons of her blouse to expose the tops of her meaty breasts, her long, line of sexy cleavage, and her while, lacy, low-cut bra. While wishing her hand was his hand, he watched her reach inside her bra to finger her nipple.

Only, how could he do more than just flash his prick to his sister-in-law with his wife, her husband, and his mother-in-law in the pool? For sure, if he was alone with Colleen, after she asked him why he never flashed her his cock, he'd be putting a gentle hand behind her pretty head and guiding his erect prick in her mouth. For sure, he'd be taking her out to the toolshed and stripping her naked. He'd be having his wicked, sexual way with her big tits before bending her over the workbench and fucking her hard and fast.

"She refused to go in the hot tub but she took her drink out with her while I stripped myself naked," he said changing the subject somewhat. "I'm not embarrassed to admit that I was sexually excited exposing myself to my mother-in-law and she wasn't embarrassed enough not to stare at all that I was showing. With her giving me the eye as if daring me to strip naked, I had an erection before even getting in the tub," he said. "In the way that I had imagined staring at her naked body, she stared at my naked body."

Colleen looked at him wide eyed.

"I never figured you for wanting to have sex with Claudia's mother," she said. "I always figured that you'd want to have sex with me. I always figured that you'd make a sexual move on me. I always imagined you touching me and feeling me through my clothes," she said touching and feeling her big tits through her bra and blouse. "I always imagined you stripping me naked and forcing yourself on me while I feigned my reluctance," she said laughing while continuing to finger her pussy as he continued to stroke his cock. "While masturbating myself, I'm not embarrassed to admit that I've often imagined blowing you."

Obviously not knowing what to say to Colleen confessing her sexual thoughts, he shrugged.

"Why not? What wouldn't I be attracted to Corrine? She's an attractive woman. She's an older version of Claudia but not quite as busty. And she doesn't look her age. Besides, this happened years ago. Even now, if I didn't know that she was 71-years-old, I'd think that she was 61-years-old," said Mark eying his sister-in-law masturbating herself. "I didn't say that I haven't thought about having sex with you. I've imagined having sex with you quite a lot, if you want to know the truth. I've imagined having my wicked, sexual way with your big tits."

Colleen stared at her brother-in-law with curiosity.

"Tell me. I'd like to know. Have you masturbated over the forbidden thoughts of touching me, feeling me, fondling me, and having sex with me?"

Mark looked at Colleen with sexual excitement.

"Yes," he said.

She rubbed her clit harder while fingering her pussy deeper.

"Have you masturbated over the forbidden thoughts of making love to me before fucking me?

He stroked himself faster.

"God, yes. I imagine making love to you all the time. I'd love nothing more than to French kiss you right now," he said.

She smiled while giving him a sexy look.

"Have you masturbated over the forbidden thoughts of licking and fingering my pussy before I sucked your cock?"

He looked at his sister-in-law wide eyed.

"As much as I'd love to lick you pussy, I'd love for you to suck my cock," he said.

She smiled her sexual excitement with his answer.

"Tell me. I want to know. Have you masturbated over cumming in my mouth and watching me swallow your cum while you feel my tits and finger my nipples?"

Teasing him and tempting him, she knew exactly what to say to sexually arouse him. At a loss, other than to continue to stroke his prick while watching her fingering her pussy, he didn't know what to say to the sexual imagery that she painted, Mark looked at his sister-in-law with his mouth open. Now that Claudia was having sex with her brother, he wanted to have sex with his sister-in-law.

"Oh, my God, Colleen. I'd love nothing better than to see you naked. I'd love nothing better than to have sex with your naked body. I'd love nothing more than to see your big, naked tits. It would be my sexual fantasy come true to finger your pussy while licking your pussy. It would be my sexual fantasy come true to make love to you before fucking you. I'd love nothing more than for you to blow me," he said. "I'd love nothing more than to cum in your beautiful mouth."

As if she was ready to suck him, she gave him a sexy smile and a naughty look.

"Well, maybe if you play your cards right, I can make all your sexual fantasies come true," said Colleen with a dirty laugh while pausing as if formulating her thoughts. She withdrew her finger from her cunt and with him watching her, she sucked her finger as if she was sucking his cock. "So, tell me, what happened with mother? Did the old, drunken broad blow you? Did she suck your cock? Did you cum in our mother-in-law's mouth? Did she swallow your cum while you felt her naked tits and fingered her nipples before fingering her cunt?"

* * *

Mark laughed nervously over his sister-in-law's interrogation.

"It was nothing like that but after she fell in the hot tub—"

Colleen looked at Mark with shock.

"What? Wait. Back up," said Colleen laughing. "Corrine fell in the hot tub? How did she fall in the hot tub?"

Mark shrugged his indifference.

"She was drunk. We've all been there," said Mark with a shrug. "She was sitting on the edge one second and when she leaned down to feel the water, she fell in head first."

Colleen looked at him with suspicion.

"I don't believe you. You're pulling my leg," said Colleen. "Hoping to get her naked, did you deliberately pull her in the hot tub when she refused to strip off her clothes?"

Mark made a face, crossed his heart and raised his right hand as if he was about to swear on the Bible.

"No, I did no such thing. I did not pull her in the hot tub. She was drunk. I kid you not. In the same way that Alec pulled her in the pool with her clothes, she fell in the hot tub," said Mark.

Colleen looked at her brother-in-law with shocked surprise.

"And what did you do when our mother-in-law fell in the hot tub then in the way that she fell in the pool now," said Colleen with a dirty laugh?

Instead of returning her laugh, Mark looked at his sister-in-law with shame and remorse.

"Sexually excited then but embarrassed to say now, I helped her out of the hot tub while I was still naked. I'm ashamed to admit that I sexually took advantage of her while she was drunk. While rubbing myself against her, I touched and felt her through her clothes where I always wanted to touch and feel my mother-in-law through her clothes," he said. "Then, if that wasn't enough, I stripped her naked on the back porch."