"Our next sexual battle..." Rias began "Will be...a fingering contest!"
"Ohhhh..." Akeno said with lust.
"We will use our fingers to pleasure each other until one of us can't go on anymore" Rias explained. "Of course, the two of us just finger fucking each other would be boring. We are allowed to make out, play with each other's hair, grab each other's tits and asses, etc. but one hand must be in the other girl's pussy at all times".
"Sounds lovely" Akeno commented. "I'll finger fuck you until you can't walk for a week!"
"Then c'mere and play with my pussy already, bitch!" Rias challenged.
The girls got close enough so they could both finger each other in a comfortable position. They kissed passionately for about a minute to get each other nice and moist and as if reading their rival's mind, they both dove their hands down into the other girl's honey pot, moaning with pleasure into each other's mouths as their tongues battled for dominance and their other hand groped in their opponent's long, luscious, flowing hair. They ruthlessly assaulted each other's pussies, flexing their fingers, balling their hands into fists, pushing in and out, until Akeno found Rias's G spot and dove in, causing the redhead to break their kiss and moaned as her rival pleasured her. To get payback, Rias found Akeno's clit and pinched like she never pinched before, making the raven haired fallen angel moan in return.
The buxom babes resumed their kissing session while keeping this up, this time their tongues brutally wrestled as the girls drooled over each other's massive tiddies, their nipples stabbing into each other. Their other hand reaching into their rival's hair to tug and pull to try and sustain themselves under their opponent's pleasure technique. They sucked on each other's tongues, yanked each other's hair, sometimes slapped their rival's bulbous ass and kept this up for almost an hour. They had each came about two or three times. They lost track. This wasn't about making the other girl cum first. It was a battle of endurance and more importantly, a battle to entertain their boyfriend. Thoughts of him jerking off to their display kept them motivated. They loved to put on a show for their man.
After another mutual orgasm, the girls seperated for air. Their faces, asses and pussies were all beet red. They were both exhausted and they both inew it but neither girl was backing down. Rias and Akeno were best friends and fuck buddies but they were extremely competitive and determined. They caught their breath and ogled each other's naked and disheveled form, just the sight of their rival making them wet for each orher again but they simultaneously said the same word...
"Breaktime"
"There's a hot tub out back" Rias said seductively.
"Enchantè" Akeno agreed.
Both girls walked out into the backyard, giggling and touching each other as they went to take a nice, relaxing dip knowing Issei won't mind watching them soak in a hot tub and play with each other casually before resuming their debaucherous contest.