Samantha twitched...and twitched. There was just no escaping it. Her body was betraying her, all afire with need. She had even had to hold her leash chain within her jaw to keep all her uncontrollable cries stifled, after all it would not do to alarm her passengers. She needed to keep her focus on the road, her white knuckled hands upon the wheel.
Her brand-new sister, Rubi, was being taken to her first fetish ball. "I want to sit in back with Mistress!!", she had cried joyously as they left the house. Miss Eva had caught Sam's eye slyly, tossing the keys her way, replying breezily, "I guess that means you're driving, My treasure."
Both of the girls were excited, even if Sam had been to such events before; being there for her sister's first time would be a delight.
Before leaving Miss Eva had selected outfits for both her girls (both hidden presently under trench coats). Rubi was decked out in clinging shining vinyl of the deepest black, the catsuit had been designed with strategic cutouts over her breasts and her pussy, for easier access (as Miss Eva would often put it). Samantha was topless under her coat and wearing naught but a garter and stocking set. The garters black with crimson accents, the welt of the stockings matching that stark red.
Each girl was also fitted with a long thick dildo within the roundness of their rumps, buzzing at a none-too-gentle setting. Miss Eva had also had the ingenuity to connect the girls by those dildos stuffed so far up within them, she had threaded a chain through the back panel of the front seat after they had sat, and connected the chain ends to the cap of each dildo. The chain was not very long so that Rubi could not sit fully back against the back seat, not without sitting twisted sideways. But the excitable girl was perfectly willing to sit on the floor of the back seat at her Mistress's feet.
Satisfied with the way Her girls were set up within the limo, Miss Eva sauntered round the back to the passenger side and settled within, and they were on their way.
It should have been an easy ride, the venue for the ball was not all that far from Miss Eva's residence, just a short ride up the freeway. But Rubi took it upon herself (much to their Mistress's delight) to pleasure her owner on the way, insinuating herself between Miss Eva's legs and diving under Her skirt to lash her tongue at that divine sex.
This, of course, would not bother Samantha in the slightest...as it gave her the greatest joy to see both of the ladies in her life satisfied to the fullest...except that she was tethered to her sister's lifting bouncing ass as she was trying to drive.
Gritting her teeth, almost chewing on the chain of her leash, her body shuddering, her sex calling to her as perspiration gathered between her tits, she kept her eyes riveted on the road.
Eventually however, the call of her body's craving was to be Samantha's undoing. After all, she could hear the delicious purrs of her Mistress, and she could feel each and every bob of her sister's ass as it tugged upon her own, compounding the effect of the incessant throbbing of the phallus.