I forgot to write an end to this story, even tho it was an interesting one, so:
The End-
And with that, the improvised duel between both sisters began. Each one began kissing the cock from her side, slowly going up as the cock grow bigger and harder with each kiss. Finally, both girls met their mouths on top of the full erect rod and with that, they began to fight with their lips and tongues to control the cock and win the first turn at sucking the dick. The siblings joined cheek to cheek, trying to push aside the other woman, as they sticked they tongues and kissed the cock, trying to win eye contact with the guy. Fighting with their facial expressions to gain the attention of that hot boy.
After what seemed to be hours but really was less than a minute, Martha scored the first point, pushing her sister aside and, without hesitation, engulfing the cock fully into her mouth as she slightly laughed, looking sexily at the man above her while Caitlyn tried not to lose so much tempo and began to suck the man's balls. She knew she will have her turn but she had to be aware for her moment to attack.
Meanwhile Martha was easily deepthroating the huge cock, sucking him off with mastery while staring at the guy's eyes. The man was captivated by the sexiness and skills of the younger sister. Martha ended her turn travelling her tongue around the cock, from the base to the top.
"Here comes my vengeance, sissy" She thought.
Caitlyn then attacked the cock with anger, the memory of her previous defeat in France and how she lost her man still haunting her, but she got to overcome from that. She had to assert her dominance over her sister...else...She tried to keep those thoughts out of her mind and began to suck the dick with an incredible rhythm, trying to simply end the duel fast and easy by making the guy cum in her mouth. She made eye contact as she licked the rod with hunger while Martha engulfed both balls inside her mouth, trying to regain the attention of the man.
Caitlyn and Martha turned and turned during five minutes until the climax of the fight arrived, both girls began to travel their lips up and down at the same time along the cock, one of them from each side, meeting on top again and renewing their duel on top of the cock, their lips fighting to reach the final victory and their tongues trying to conquer the cock, expelling her sister...no...her opponent, from the fight.
Finally, it happened.
"...Oh no" Caitlyn thought as she felt how her tongue was completely tamed by her sister's and pushed inside her own mouth with herself unable to do anything to avoid it. Her lips were being pushed aside as Martha took complete control over the cock, engulfing it completely inside her mouth during less than 5 seconds, but it was enough. She deepthroat again exposing her tongue to lick even the balls and, with that, all was over.
The man grabbed both girl's head and place them one besides the other. For Martha it was the moment before her so-searched victory and for Caitlyn, it was like waiting in the slaughterhouse, she knew what was coming...The man placed his cock on Martha's mouth and slap her lips with it while cumming brutally over the victorious woman's face.
Martha enjoyed the moment looking up at the guy, with that sexy, slight laugh and showing her middle finger to her sister, who was besides her, lowering her head in defeat. She was no longer the better sister. Martha had her beaten, tamed, destroyed.
Martha looked at her with superiority, smiling and with her face filled with the man's cum. The guy spoke "Sorry Caitlyn, but your sister was simply too much...". Caitlyn stared at her sister, who was licking her lips sexily, tasting her prize and she admit it.
"Yes...I know...She's the better sister". And with that, she got up and walked away. Leaving the victorious woman alone with her conquest.
