Patty and her daughter were lapping the jizz out of each other's cunt after they'd finished draining the boys' balls when they heard a female scream from outdoors. Bolting upright, they assumed, along with Marty and Ron, that something had happened to Linda. How right they were.
Sally went to the window and pulled the curtain aside. When she turned back to face the others, her jaw had dropped and the color had drained from her face.
"What is it?" her mother asked.
"Better look for yourself, Mom," Sally muttered. "After all that's happened lately I didn't think anything could surprise me anymore, but I don't know how to explain this."
Patty went warily to the window. She was just as stunned as her daughter.
"Of course," Patty whispered. "She was right under my nose the whole time. The last one I'd ever suspect of being the one Ben's been cheating with all along. The other woman! Ben's other woman is his own sister!"
Neither of the boys could believe it. They went to the window and saw for themselves. They, along with Sally, looked to Patty to find out what was supposed to happen next.
Patty, pale and drawn just a moment before, broke out in wild laughter. The kids thought maybe she had snapped completely, but she quickly proved that she was back on the beam.
"God, it's perfect. Don't you see, it's absolutely perfect!" she declared. "The perfect solution to everything!"
Patty started toward the door.
"God, Mom, where're you going?" Sally asked.
"Where else? Out where the action is!" Patty bubbled.
"But you don't have a stitch on and there's all that snow."
"Linda's bare-assed, too, so it's just as cold for both of us," Patty merrily pointed out. "And I aim to make it just as hot for me as it is for her, too. Don't you get it? Thanks to Linda, it's your father's chance to be one of us. No more reason for him to cheat. And no more reason for us to hide anything from him. We'll all be one, big, happy, sucking and fucking family. Like I said, the perfect solution!"
Stark naked, Patty went out the door and into the snow. The kids scurried back to the window and watched in awe.
Patty circled to the rear of Ben and Linda without the fucking couple noticing her. Indeed, they were so tangled up with each other in their pumping frenzy that Patty was able to crawl on her belly across the last several feet in their direction without them spotting their approach.
From behind Ben, Patty made her still invisible presence felt with her slurping tongue. Patty licked down the crack of his ass to his dangling balls. From there she moved her tongue to where his cock filled his sister's pussy, lapping Linda's stretched, swollen lower lips.
Still, however, Ben and Linda had yet to catch on that they were now part of a threesome.
Now Patty went even further, moving her tongue all the way down to begin giving her sister-in-law's asshole a rimjob. She put her hand into play, rhythmically squeezing Ben's nuts.
"Oooooh, Benny," moaned Linda in response, "dunno how you're doing it, but almost feels like you're reaming my ass at the same time you're fucking me."
"Must be your imagination, Sis," Ben answered. "I'm not touching your ass. If you want me to, you got it. Just go on playing with my balls the way you already are and I'll give you a couple of fingers where you shit."
"Your b-balls?" gulped Linda.
"Yeah, keep squeezing 'em, Sis."
"But I-I'm not!" Linda said. She provided proof by holding both of her hands up in her brother's face.
"Th-then what the hell? I still feel it."
"Me, too," Linda whispered. "Someone's definitely doing something to my ass."
"And to my balls."
Each fucker warily reached to the part of the other's body in question. Linda felt herself all but shaking hands with someone as she groped for her brother's balls. And Ben's fingers traced female cheekbones down at his sister's ass.
Now, knowing for certain they were not alone, Linda and Ben abruptly broke off their fuck, pulling apart from each other.
"P-Patty," brother and sister choked together.
"In the flesh," Patty answered, nakedly greeting them. "Don't stop fucking because of me. I was just beginning to enjoy it almost as much as you two were. After all these years it's about time I got in on such a good thing."
Ben, though, still didn't understand where his wife was really coming from. "This is some sort of trick," he accused. "You're setting me up for something by coming on this way."
Patty boasted, "You bet I'm setting you up, Ben. You don't have a chance. No way you're getting away with fucking Linda behind my back anymore. If you wanna fuck your sister, you've gotta pay the price."
"Okay," Ben mumbled, thinking of a messy divorce, "what's it gonna cost me? You've got me by the balls."
"Mmmm, you're telling me," Patty teased, reaching for and squeezing her husband's hairy balls again. "But I'm not the only one who's gonna get a hold on 'em. It isn't just me you have to satisfy if you want Linda."
To Ben's astonishment, Patty turned and called out their daughter's name.
Tripping out the door into the snow, Sally was stark naked and girlishly giggling. Having seen and overheard everything, she merrily announced that she couldn't wait to help get her father by the balls. All at once Linda pushed him down onto the snow, then kept him pinned there by sitting on his chest.
Caught off guard, Ben tried at first to struggle free. But then he found himself on the receiving end of his threatened fate. Dividing the task, Patty and Sally each took one of his balls in her mouth and started sucking for all she was worth.
"Hmmmm, seems to agree with you," Linda chuckled, watching Ben's cock helplessly stiffen. "And, since you don't have any more balls to get, just looks like I'll have to take what's left."
Linda moved down from her brother's chest to his crotch. Her cunt swallowed his uncontrollably rigid prick and she was fucking him at the same time his wife and daughter sucked him.
"Jesus, what the hell's happening here!" Ben blurted in total confusion, at his wit's end.
"The same thing that's been happening the whole time we've been snowed in!" Linda gleefully said. "Only now you're one of us, too, Brother, dear. As soon as the boys get here and plug in, we'll be one, big, happy family."
Marty and Ron spilled from the doorway, bare-assed with their teenage hard-ons leading the way.
They didn't have to be told what to do. Each boy offered his mother his rigid prick when he arrived at the action, and each mother began deep-throating her hung son on the spot.
"Sorry I can't help Sally get you by the balls anymore, Ben," Patty teased her husband with a mouthful of their son's cock after bobbing up to give Ron head. "But our little girl will keep getting the job done on her own while I blow Ronnie."
"Well, Pop, what do you think?" Ron asked. "Enough sucking and fucking for you? It's been like this ever since the blizzard. Mom, Sis and Aunt Linda can't get enough. When they're not after cock, they're getting it on with each other."
"Bet you never expected that you'd come back to this, huh, Uncle Ben?" Marty added. "But don't worry, you'll get used to it just like we have. We were just like you in the beginning when they started ganging up on us. You ball one of 'em back home like we all did and think you're getting away with something secret. But then it turns out up here in the mountains that you're a stud-service for all three."
"So you two kids were fucking them before we left, huh?" Ben asked. "Who was fucking who?"
"Well, I fucked Sally and then I fucked my mom," Marty confessed.
"And I was fucking Mom," Ron revealed. "I didn't get to fuck Aunt Linda or Sally until we were up here and we got snowed in. Jesus, Pop, it's been pretty wild since you left. You missed out on a lot."
"I'll bet I did," Ben muttered. "Damn."
"Well, everything's out in the open now," Linda said. She looked around and laughed. "Jesus, are we out in the open!"