"I can hardly believe what's happening right now." Christof looked at me and sat down.
"So honestly...Liane has said many times that she thinks you're hot."
I looked at my brother-in-law, "And that doesn't bother you at all?"
"Actually, no. We've been to a swingers club before, too."
"Christof! We're related!"
He just laughed.
Just then our two women came back out of the house onto the patio.
"Well guys? Do you like us?"
My wife Andrea came outside first. She wore an ultra skimpy red thong swimsuit that presented her almost 100kg incredibly hot. Her big butt was practically bare and her breasts were covered by thin bands that would immediately slip in the upcoming fight. Her big tits spilled out to the sides and Christof couldn't look away.
My brother-in-law and I were both rock hard!
And then came Liane!
She weighed almost as much as her sister and was just as big. Only her bust was two sizes bigger. She wore only a white thong that was almost transparent.
She had apparently oiled herself, because her hot curves shone.
Her heavy breasts swayed with every step. She turned, bent over in front of us and presented me her thick shiny ass.
SMATTTTTTT! I slapped her with the flat of my hand so that her hip fat just quivered.
"AAYYYYYYYYY!" Liane shrieked out while Andrea was already walking to the muddy puddle.
"Stop getting my husband hot! Come to your sis and get a spanking!"
I spun my lawn chair so I wouldn't miss a beat.
"In her sexy red one-piece today Andrea Schröder, 36 years old, 170cm tall and well endowed with 90DD, fights against her wonderful sister Liane...."
Christof took over the rest of the performance:
"Exactly! Today she has to prove herself! Liane is 35 years old, 170cm tall and brings a 90G bust!"
We applauded loudly and cheered as the two sisters flexed their biceps, turned and presented.
Both massaged their breasts for us and slapped each other's thick horny asses provocatively.
SMATTT....SMATTTTT....and then they took position at the puddle.
It was filled with water, grass and some mud.
"Fight!"
The two circled the puddle in their midst and Andrea said, "What's wrong now you big mouth! You titty bitch! Just hitting on my husband like that in the shower?"
"And you should keep your hands off my Christof's cock! You just grabbed his pants and got your nipples sucked!"
That was enough of words. The two of them rushed forward and SMACKKKKKKKKK! Rammed together with force. The big natural tits smacked into each other just like their bellies and the two sisters groaned from the force.
Just were 200kg rammed into each other, slipping their feet through the puddle and grabbed each other by the thong and swimsuit.
Andrea's breasts were immediately liberated and the thick udders piled up between them like mountains.
My wife tore at the side of her sister's thong, gave hers a wedgie and threw her into the mud with a hip toss.
SMACKKKKKKKKK!!!! "AYYYYYYYYY........AHHHHHHHHHHHHHHH!"
The water splashed for meters and Liane's curves trembled at the impact.
She moaned and held her back while the thong disappeared into her labia.
"Well wait you bitch!"
Liane's eyes sparkled with rage, but Anne just kicked her left tit with her foot so hard that my sister-in-law got her own boob on her chin.
SMACKKKKKKKKKK! Dirt splattered and Liane went moaning again to the ground after she had come with difficulty on her knees.
She was already completely covered with watery mud running down her sexy curves.
"Fuck! Are you ok Mausi?" Christof got to his feet and tried to come to his wife's aid.
"Give it a rest Chris. Your wife started all this and now she's going to have to face the music."
He looked at me confused. "She just got kicked in the chest damn it!"
"And it won't be the last....," Andrea said with a grin.
"What did you think? That we'd roll around in the mud for a bit?"
WHAMMM! Liane had suddenly pulled my wife's legs away and Andrea's big ass slapped the mud.
Liane threw herself on top of her, grabbed her hair and wrestled her to the ground.
Both sisters cursed, laughed and moaned as they rolled in the dirt.
"Are you also....so stiff?"
Christof was totally nervous and a little ashamed of his erection.
I looked down and my shorts bulged tremendously as well.
The luscious quasi-naked mud-covered bodies were wrestling with each other, breasts were flying around and buxom asses were quivering.
Andrea had gotten under her sister and moaned as she took several punches to the stomach. She countered by grabbing her sister hard by the tits and thrusting her legs into her stomach.
SMACKKKKKKKKKKKKKKKKKKKKK! "GOTTTTTTTTTTTTTTTT!"
Andrea had lifted the nearly 100kg and sent it flying through the air. Liane came down on her back with full force and her big G-cup tits trembled for quite a while after the impact.
She got on her knees, wiped dirty strands of hair from her face and grinned at Christof and me.
"Whoo! Exhausting but cool! I wonder what your wife can get off on those boobs?"
She didn't wait for an answer, interlocked her hands and rammed her double fist forcefully into her sister's right tit.
SMATTTTTTTTTTTTTTTTT! "FUUUUUUUUUCCCCCCCCCCKKKKKKK!"
I groaned in excitement as the fist hit the soft breast so hard that my sister-in-law's eyes popped out of their sockets.
She rolled to the side, turning her thick mud-covered ass towards us.
Andrea rolled her further, sat on her back and yanked her up by the chin into a Camel Clutch. Her spine arched and her hanging big udders lifted off and dripped under her.
The property was very remote, but Liane's cries still echoed loudly through the surrounding forest and across the nearby lake.
"AAAAAAAAAAAAAAHHHHHHHHHHHHHH!" They really didn't spare themselves. And as it seemed, my sister-in-law really got some.
Andrea pulled hard on her chin, then wrapped her muddy hair around her right hand and yanked her sister back by the braid.
"GOOOOOOOOOTTTTTTT FUCCCCCCCCCKKKKKKK!"
With that, Andrea had one hand free and boxed around the side of her chest into her heavy left tit.
SMATTTTTTTTTT....SMACKKKKKKKKK..............CLOPPPPPPPPP! Fist after fist thudded sideways into the tit flesh, spraying mud.
Andrea suddenly let go and her sister's rack rammed into the mud, followed by her face.
Liane spit out the mud and tried to clear her eyes. Andrea stood over her and flexed her biceps for us.
SMATTTTTTTTTTTT! "AAAAAAHAAAAAAAAAHHHHHAAAAAA! A long drawn out scream showed us that something must have happened. Liane had kicked blindly from below and probably hit Andrea's pussy.
Andrea staggered, held her pussy and took heavy slaps in the dangling tits as she bent over...