"And what would you do now?" Helen gulped. "If I agreed to go along with this?"
"F-fuck Ann," Brad stammered.
The room was thick with tension as Helen turned to her sister-in-law. "He's all yours, Ann."
Ann needed no further encouragement. As she stood, she dropped her skirt. Then she tugged her bikini panties right up into her hairy cunt so her bush bristled at the sides and her lower cunt-lips oozed in exposure. Next, she closed the distance between her and wide-eyed Brad.
"Eat it, stud," she said to her seated brother. "Suck my panties out of my horny cunt and eat right through me while my Pete and your Helen watch. Maybe it'll give 'em some ideas about each other and we'll have ourselves an orgy on our hands."
Brad's face pressed flush against his sister's flexing cunt. Then his slurping tongue was within her juicy cunt-gash. And at this point, responding to the example set by their spouses, Pete and Helen made eye-contact.
"You like 'em big, honey?" he asked her.
"Bigger the better."
"Then how about trying this on for size?"
Pete unzipped his pants and pulled out his cock. He hadn't exaggerated.
Having made her decision to go along with the swap, Helen Conway dropped to her knees before her well-hung brother-in-law. Pete rewarded her by jamming his long, thick hard-on down her welcoming throat.
But Helen wasn't satisfied with just sucking cock. Pulling Pete down to her level, she coaxed him to twist his rigid cock around in her mouth.
"Sixty-nine!" Helen urged with a slurping mouthful of cock.
Pete promptly flipped up her skirt. She had on panty-hose, which he yanked down to her knees. Then he buried his face in the hairy mound of her uncovered cunt, lancing it with every inch of his tongue.
And, as they feasted between each other's legs, Helen and Pete did not go unnoticed…
"Oh, look at them," Ann said to her brother, as Brad ate her cunt. "Helen's going down on Pete's cock at the same time he does it to her cunt."
"You mean, we ought to catch up with them and sixty-nine, too, Sis?" Brad asked.
"Absolutely! That's what a swing-party's all about!" Ann declared. "Everybody getting it on as good as everybody else."
"Hold on then, Sis," panted Brad.
He bolted from his chair. His sister was forced back. Yielding at the waist, Ann was flattened on the carpet with Brad draped on top of her. From there he pivoted, winding up straddling her head.
"Oooooh, you don't know how long I've waited to get my chance at your cock," Ann told her brother.
Ann unbuckled Brad's belt, then yanked open his pants and pulled them down with his shorts. His stiff cock sprang forth. A moment later and Ann was deep-throating it to the root.
So now the couples sixty-nined together, mirror images of one another. It was a question now of which of the two husbands or pair of wives would come first as a result of getting it on with a swapped mate.
The first orgasmic payoff was a female tie. Helen and Ann climaxed simultaneously. Each fed the other's husband the cum from her tongue-fucked cunt, and both men greedily feasted on the sweet nectar while continuing to fuck mouth at the other end of the action.
Then, swiftly, Brad and Pete caught up. Their cocks exploded down the thirstily gulping throats of each other's wife. The women drained the balls of their new partners dry, then kept on deep-throating to make sure that the cocks remained hard in spite of being so thoroughly milked.
"Hmmm, I've still got some kinda bone in my cock," Brad said to his brother-in-law. "How about you?"
"Hard as a rock," the other answered. "Well, then, let's use 'em! These bitches didn't keep our cocks this hard for nothing. Sucking's over, time for fucking!"
"Yeah! Let's go for it, fella!"
Moving as if each were a reflection of the other, Brad and Pete wheeled around above their swapped wives. Helen and Ann reacted in kind, raising their knees to reveal their already sucked cunts between their flared thighs in the classic fucking pose.
"Put it in me!" both women cried.
Both cocks surged, making the juicy cunts they hilted squish out loud. In reaction, each wife wrapped her legs around the other's husband and pushed back as he began to fuck her.
"Oooooh," Ann cried, "I've been swinging for the last five years and have a hung husband of my own, but this is the cock my cunt's been waiting for ever since I found out what fucking is. My own brother's big, hard cock!"
"Your cunt's so tight, Sis!" Brad grunted while he rhythmically thrust. "You'd bring out the stud in almost any guy."
Pete called over to his brother-in-law as he fucked Helen alongside Brad and Ann. "Well, this little wife of yours has a cunt just as tight as any that any man could ever want to fuck. She might not be my sister, but I'll be more than glad to screw her any time."
"Mmmm, the feeling's mutual." Helen moaned, letting Pete know she was more than satisfied with her end of the bargain. "Just watch me come for you, stud!"
Helen climaxed at once, her rippling cunt tugging and hauling Pete's cock while she shuddered from head to toe. And once it was obvious how much she was coming, Ann was determined to equal Helen's performance.
"Hurry, Brad." Ann urged her brother. "Make me come for you, too!"
Brad promptly ripped open his sister's blouse and went for her big tits. Snatching them out of her bra, he wrenched them around.
"Owwwww, perfect!" Ann squealed with painful pleasure. "It's like lightning, going straight from my titties to my cunt!"
Ann came every bit as hard as Helen just had before her. So now it was the latter's turn to make sure she held her own with her sister-in-law.
"Do something to my titties, too!" Helen instructed Pete.
She wore a sweater. Then it was over her head and gone, along with her bra. Her tits were large, too. Pete went for them face-first instead of with his hands, licking until they glistened with his spit and then popping a plump nipple into his mouth.
"Don't just suck," Helen said. "Use your teeth and bite. Bite me! Bite, my tits!"
Pete gave her what she craved, clamping down on her tender tit-flesh.
"Arrgghhh!" Helen screamed. "Hurts soooo gooooood! I'm coming twice as much now as I did before!"
"Oh, don't let her get ahead of me!" Ann frantically told Brad. "Pour it on, stud!"
At this point, Brad turned his attention to a new target on his sister's body. From her tits he lowered his hands all the way below his cock in her cunt. Then he seized her ass-cheeks and yanked them apart. Next, a finger from either side pushed toward the narrow opening at the heart of her ass-crack, probing to enter.
"Yes! Damn, yes!" Ann expressed her delight that Brad had found her back door. "Do it to me down there! Finger-fuck my horny asshole at the same time your big cock's fucking my cunt!"
Brad dug right in with the pair of fingers, so he could feel his cock bumping against the thin wall separating his sister's asshole and cunt. For her part, Ann climaxed deliriously.
And reacting to her sister-in-law's surge of added orgasmic joy from getting it up the ass, Helen would settle for nothing less on her own account. "Finger-fuck my ass, too!"
"Hey, I can do something even better than that for you, if your ass can take it," he said.
"You know it can!"
"Hold on, then!"
Pete slipped his cock out of Helen's cunt. From there he aimed his cock a notch below, widening the narrow female passage by stretching the lower cheeks as widely as they would go.
"If you've got any second thoughts about all this cock where you're tightest, little lady, this is your last chance to stop me!" Pete offered Helen an opportunity to change her mind.
"Ram me! Rip me! Fuck the shit out of my ass with your monster cock!" she screamed.
"That's guaran-damned-teed!" said Pete.
His loins bucking with power, he shafted Helen's welcoming asshole with every inch of his huge cock on the first try. She whimpered with pain, then sang out in ecstasy, as she abruptly came from an assful of cock. It was even better than getting her cunt fucked.