Not quite

"Getting there. So you said you're the biggest freaks we've ever met. Why don't you prove it." Mark challenges them.

The twins look a little taken aback that what they've done so far hasn't worked yet, but they also seem eager for the challenge. They look at each other a moment brain storming before Mia spots something that might help.

"Pass those to me will you." Mia says to Mark, pointing at a set of balls in his bag.

The pool toys are about the size of tennis balls. Mark looks confused but does as she asks, handing the bag of balls to her. Whilst they were previously intended to be used for pool games, Mia has a much more devious use in mind. She takes the lead, turning her sister around and lifting her so her ass is up out of the water before bending her over the edge of the pool. Tracy naturally takes on her submissive role, allowing herself to be guided by her sister. With Tracy's ass in her face, Mia pulls her sisters thong aside, exposing her bare asshole and pussy, before diving in tongue first to lick her back door. Her tongue inches its way in through her tight asshole, lubing it up nicely with her saliva. The men watch on both intrigued and deeply aroused at this display of sisterly depravity.

Once Mia determines her sisters asshole sufficiently lubed and loosened, she removes her tongue and instead pushes the first red ball against her sisters back door. Tracy lets out a gasp as she feels the ball make its way inside her, now realising her sister's intentions. Mia pushes the ball as deep as she can inside of her sister before removing her fingers and watching as Tracy's anal sphincter spasms as she tries to push out the intrusive object. The men can see her face of deep focus as she pushes the ball out of her rectum and into the pool, making a satisfying *plunk* sound as it drops into the water.

Mia grabs the ball out of the water and licks it all over with her tongue, completely disregarding that it just came from her own sister's asshole. She then goes to shove it back inside her sister's asshole, this time far deeper, getting her whole hand inside to push the ball far into her rectum. Mia toys with Tracy's asshole, slowly fisting it to her sister's intense pleasure. The men watch on, deeply interested and disturbed by this perverse act.

Once she's had her fun, Mia proceeds to insert another ball into her sister's asshole, then another, and another, until finally the bag is empty and each and every ball is inside Tracy's rear end. At this point, Tracy knows her task, having had performed very similar ones many times before on stage at the strip club. With a great deal of effort, she begins pushing with her ass, desperately trying to squeeze the balls out of her asshole. Sure enough, before long her onlookers are met with a bright green colour right in the centre of her hole as it begins to expand. Suddenly, the ball comes flying out and falling down into the water, only for the centre of her asshole to be replaced with a bright red colour, the next ball.

She continues pushing until finally no more balls come out, signified by the sound of air being released after being trapped inside her rectum.

"So, that freaky enough for you boys?" Mia asks.