This story involves incest and swapping. If that bothers you or is not something that you enjoy, please move on. If not, enjoy.
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A family of four (husband & wife: Tom and Alice, kids: Maggie-19 and Mark-18) were 2 weeks into a month long vacation at a cabin by a lake, when Mark finally wore down his mother's defenses and she allowed him to make love to her. It was a beautiful and very fulfilling gift the mother gave to her son.
After watching his wife and son have sex, Tom made passionate love to his daughter Maggie. She had been trying to seduce her father for those two weeks and was finally rewarded with her father bringing her to multiple orgasms, before he unleashed his seed into his precious little girl.
Afterwards, Alice tricked her husband into fucking her and the once-distant couple rekindled their love for one another.
What was to happen on the rest of this trip was still undecided, but on this night, Tom returned to his daughter's bedroom, while Alice returned to the master suite, where her 18 year old son had fallen asleep, nude and while awaiting his mother's return.
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As Tom approached closed the door to his daughter's bedroom, he still couldn't believe what had transpired this evening. He watched another man seduce and have unbridled sex with his wife. But not just any man, his own son. Mark had successfully seduce his own mother and made passionate love to her, culminating with him depositing a huge load of semen deep within his mother's vagina. The same vagina that he had passed through, some 18 years beforehand and a vagina that Alice now hoped that her son's large cock would visit many more times.
Tom looked at his daughter's nude body draped in just a sheet and felt fortunate that he was allowed to make love to his baby girl. A girl who had grown into an amazingly sexy young woman whose body drove men crazy with the thought of seeing, touching, tasting, and fucking. His bare cock had slid through the petals of her vaginal entrance, penetrating her tight pussy lips, to repeatedly slide in and out of his daughter's exceptionally tight vaginal canal. The walls of her pussy gripped his cock, as it passed through and the feeing in his cock was almost unbearable! The always respectful father marveled at how lucky he was to have a daughter who wanted to have sex with him.
Tom had never looked at his daughter with lust in his eyes or ever been inappropriate with her. He never checked out her amazing body or ever thought about her sexually. She had always been his little girl. But now, having felt the pleasure of his cock within her body, he knew that things would never be as innocent as it always had been. He now knew what his little girl's body looked like nude and how her snug cunt had willingly accepted her father's bare cock and semen deep within her.
He recalled the moment that they climaxed together and her vagina milked his seed from his balls, to fill her pussy completely, until it oozed out of the outstretched lips of her beautiful pussy.
Finally, he thought about the passionate sex that he and his wife had just experienced in the den of the small cabin. How she verbally teased him until he removed his cock from her vagina and came.
"Come to bed daddy." Maggie whispered seductively.
Tom came out of his stupor to see that his sexy daughter had removed the sheet and was welcoming her father back to bed with her. Her breasts stood firm and as his eyes followed the contour of her amazing body, they rested on the entrance to her womanhood. The labia of her moist pussy were slightly spread and his semen was still oozing from her cunt.
Maggie saw where his eyes now focused and spread her legs a little further apart. With her gaping pussy now exposed to her father, she spoke.
"Come on daddy. I want you to make love to me again."
Tom removed his robe and Maggie was pleased that her father's cock was fully erect once again. Upon focusing on it, she realized that it was glistening with vaginal fluid and a dollop of semen dripped from the tip.
"Did you just come from fucking mom?"
Tom could not respond.
Maggie rose from the bed and walked to her father. His cock throbbed at the sight of her amazing, nude body right before his eyes. As she approached, she reached out and grasped her father's slimy cock.
"Wow. Mom's pussy must've been sopping wet."
Tom flinched as his daughter's fingers caressed his cock. The mucus-like vaginal fluid coated his stiff cock and his daughter used her mother's vaginal fluid to masturbate her father.
"What was it like to fuck her after so many years of no sex between the two of you?"
"How did you know that we haven't had sex?"
"I use to finger fuck myself every time I heard you fucking mom. She's pretty loud when she cums and I haven't heard anything for probably 10 years. Besides, she pretty much told me that you two aren't having sex when she said that there's more to a relationship than having sex. Also, Mark probably couldn't have fucked her, if she wasn't in need of some cock."
Tom's cock pulsed at that revelation.
"You like the fact that your son fucked your wife, huh?"
Tom was silent, but once again his cock throbbed in Maggie's hand. Just then Maggie dropped to her knees and slid her father's cock into her mouth.
"Yum. You guys taste great! I'm glad that you finally gave your wife some of this amazing cock, but you're mine for the rest of the night and hopefully for the rest of this vacation"
The she proceeded to stroke and clean off her father's cock, with her tongue, lips, and mouth. Tom enjoyed his daughter's amazing fellatio skills but wondered where she learned it. His cock throbbed at the thought of her sucking off her boyfriend and his eyes closed as he thought about her mouth wrapped around another cock.
Just then, he remembered that tomorrow night she would be spending time with her brother. Instantly he came to that thought. Maggie looked at his face and realized that his eyes were closed and that he was probably thinking about something other than her lips wrapped around his cock.
She swallowed his entire load, then got back in bed.
"Come to bed daddy."
"Ok."
As they lay there, Maggie cuddled up to her father and caressed his flaccid cock.
"Daddy?"
"Yes, baby."
"Please be honest with me."
"Of course."
"What were you thinking about as I gave you head?"
"Honestly?"
"Yeah."
"I wondered who's cock you sucked before to be so good at sucking cock."
"Thank you daddy." She said bashfully.
"I'm serious."
"Randy taught me how to suck cock and to satisfy my man while doing it."
"Hmmm."
"Is that what made you cum?"
"Not really."
"What did?"
"Honestly?"
"Of course."
"Your mom wants me to sleep with her tomorrow night. When the doors close, she thinks that Mark is going to attempt to seduce you."
"Seduce me?"
"Yeah. He confided in her that he wants to fuck you."