Hinata of course.

The two stand 6 feet away glaring each other down. They keep their respective stances for seconds until those seconds turn to minutes. Hinata stands still calm, collected, and not showing any kind of worry but Hanabi's expression couldn't be anything farther from calm. She's sweating her mind going through all the possibilities of her sister's offenses. But as time goes on Hanabi feels blood leaving her member and without even thinking she looks down. That was her fatal mistake as the second Hanabi's eyes leave her Hinata disappears. Hanabi quickly lifts her head and turns around keeping her stance while waiting on Hinata's attack. She activates her Byakugan and looks around her head turning left and right before looking up. As she does Hanabi makes a chilling realization what if she is under-"BAM"! Her thoughts interrupted by Hinata's palm connecting with her chin. The strike sending her into the air but Hinata wouldn't let her sister recover. She follows behind grabbing her younger sister by the waist and slamming her headfirst into the ground. As her head connects with the ground Hanabi blacks from the quick and brutal assaults to her skull.

As Hanabi comes to she feels a sharp pain in her ass. Looking up she sees Hinata digging into her ass with all 14 inches, through in her ass those 14 felt even bigger. Holding her sister's legs Hinata fucks Hanabi in the piledriver position quite literally driving her cock into her sister's tight asshole. "Ah ah AHHHH" Hanabi exclaims with each slam as she feels herself getting close. "What was that about taking my ass bitch" Hinata yells enjoying to dominate the little slut that thought she could take the Hyuga Princess. "Only ass I see being taken is yours" Hinata continues as she slams harder and harder into Hanabi's ass enjoying every second of railing her sister. "You like that you little slut" Hinata yells getting further into her groove and further into Hanabi's ass. "No way you bitch" Hanabi lies getting closer and closer to popping 'Shit if I don't get out of this I'll lose again' thinks as she feels more of Hinata's length.