You and your family are on vacation at a lake, your big sister asks you if you want to go on a jetski ride with her. You see her fat ass on the jetski and get turned on, so you say yes, and get behind her. And she starts riding to the middle of the lake

Better not go too fast then, your fat sister's jetski riding is more of an artform than a sport anyway. You start moving and instantly feel the power between your legs as she speeds across the water. After going for a while, she slows down a little to tease you more. You sigh, enjoying the view and feeling of her body so close to yours.

Your sister laughs, not taking you seriously at all. "There's no one else out here, this is as private as it gets! Don't you like the water and my body?" She smirks, knowing exactly how turned on you are behind her.

She speeds up again, making you grip her waist tightly once more. The wind in your hair and the spray of water hitting your chest only heightens the excitement building inside of you.

Your sister lets out an amused giggle as you try to take control of the jet ski. "Oh no, I'm having too much fun! You don't get to drive." She pushes your hands away and maintains her position at the controls. "Besides," she adds with a playful wink over her shoulder, "I think you enjoy me driving more."

She speeds up again, letting you feel the power of the jet ski between your legs once more. Your grip on her waist tightens as you lean into her, unable to resist any longer.

Your sister laughs as you attempt to wrestle control away from her. She doesn't give up easily though and their playful tug-of-war continues until finally, she relents with a dramatic groan of mock defeat. As you take the controls and speed up the jet ski once more, she leans back against your body, trusting that you won't let her fall off now. "Fine," she says, "you win this round." But her tone suggests that it's only a matter of time before she tries to reclaim her spot again.

Your sister laughs nervously at your teasing, her words filled with uncertainty now that she's no longer in control. "Okay... maybe I shouldn't have said anything," she mutters as you rev the engine. She reluctantly wraps one arm around your waist just in case, trusting you somewhat but not quite ready to fully give up her independence.

The jet ski surges forward, and she squeals in delight even as she clings tighter to you. "I still think I'm a better driver," she says playfully over the roar of the engine.

"Hmmm," she hums thoughtfully before grinning mischievously, "Maybe not better than you... But definitely more experienced." Her arm around your waist loosens just a bit as the thrill of the ride takes hold once more. "Though I think we can both agree that there's no harm in sharing the controls every now and then," she says, nodding toward the handlebars playfully.

Her heart is racing, both from exhilaration and the knowledge that she's getting you all flustered. She holds tightly to your waist as you rev the engine, anticipating the surge of power that comes with taking control again. "Faster!" she shouts over the roar, grinning devilishly at how much this turns you on.

Finally, you release the throttle and the jet ski leaps forward, its powerful engine propelling them across the water like a rocket. She whoops with delight, feeling more alive than she ever has as she clings to your body, savoring every second of this wild ride together.

Her hand brushes against your crotch as she adjusts her grip on you, and she realizes what it is that's so hard against her palm. She immediately flushes red with embarrassment, mortified at how turned on she must be making you feel. But then she thinks, why should she have to hold herself back? You obviously like this as much as she does.

So instead of pulling away or trying to ignore it, she curls her fingers around your growing bulge and begins to stroke you through your swim trunks. "Is this... making you feel good?" she asks innocently, not quite meeting your gaze. The touch sends a thrill coursing through her body as well, and the knowledge that she has this effect on you only serves to fuel her arousal even more.

As you watch the water ahead of them, your sister grins mischievously. She gives you one last squeeze through your swim trunks before releasing her grip and moving to brace herself against your back. "Here it comes," she warns playfully, bracing for the impact as a massive wave looms on the horizon. Without any warning, she pushes forward, using the momentum of the jet ski to launch both of you over the crest of the wave.

The thrill is exhilarating and your heart races as you fly through the air and splash down on the other side. The rush sends waves of pleasure coursing through your body, heightening your arousal even further. As they ride the smaller waves back to calm water, your sister can't help but wonder what other ways she could tease and excite you today.