Strike at every weak point.

With her breast in your mouth, you reach up with your hand and tickle her exposed side. It only takes a moment longer before every ounce of her strength drains from her body, granting you an easy opportunity to swing the pendulum of battle. Quickly, you roll her onto her back, and as you gently bring a finger down her twitching stomach, you pop the nipple from your lips and stare her straight in the eyes. "Tap out?" you ask.

Her chest rises and falls with huge breaths as she struggles to calm herself down to absolute futility. "... No," she replies softly.

"Then what if I do this?" With her sports bra fully open, you bring a hand up and give one of her tits a nice squeeze. But with your other hand, you run it down her belly, and then over the tight material barely covering between her legs. Just like you thought, there's no panties underneath. You can easily feel the crease of her pussy through her shorts. As you touch such an erogenous zone, she moans out loud, though she does so even more when you stop exactly where her clit is located--like a sniper hitting a bullseye, you know exactly how to touch these girls now.

Niki pulls back her head and arches her back as you give both ends of her body such stimulating attention. "I can't--"

"You can't fight back?" you say with a smirk.

"I can!"

"Do I have to make you cum before you give up?"

After a brief pause, she looks to you with a silent nod.

You let out a chuckle through her nose. Naturally, Niki can never tell you exactly what she wants. She just makes it really obvious instead, mostly because she doesn't know the concept of subtlety.

Through all of this action, Kyle Jr. awakens from his slumber. Niki's noises, her amazing body, all this rubbing against each other--it takes a real master not to be throbbing already. Your cock rises up and pushes against the fabric of your gym shorts, and as you slowly raise your body up as well, you can see that she isn't doing much to fight anymore. Her eyes immediately go down to your prominent erection, and when she does, the pace of her breathing increases.

You place your palm over her shorts and begin to rub in slow, sensual circles. Meanwhile, you tease your thumb along the lines of her markings. They're actually quite beautiful. It isn't that often you can appreciate them so closely. As you do this, she whimpers in pleasure. Each movement is stimulating. And as your palm moves, her hips wiggle left and right as she fidgets in place.

"You're not trying to grapple me anymore," you say. Before she can answer, you quicken the pace of your rubbing.

"Mmm, I know! Shut up!" Slowly, a smile appears on her panting face. "But I can't give up yet."

Faster, faster. The double-ended massage is very quickly too much for Niki to handle. Most girls don't have so many spots this sensitive, but poor Nikki, the one meant to be your tank, has more than any, and you're attacking as many as you can manage. It only takes moments for her moaning to be quick and loud, and for her body to begin to twitch. She squirms faster, until finally, she blurts out with a loud gasp of ecstasy--eyes roll back, toes curl up tight.

"Tap out?" you repeat.

"Ah, aah~!" Then with her mouth opened wide, she screams, "Yes, yes, yeees~!" And with that, she both cums and admits her defeat. You feel the wetness against your palm even through her pair of shorts, and as her body continues through the orgasm, she bucks her hips wildly, before gradually slowing down.

"Mmm. How was that?" you ask as you retreat your hands. "I guess I won."

"So... So good," she whispers.

"And now I get to do anything, right?"

"Oh fuck yes. Please."

"Then lose those shorts, get yourself on that exercise ball, and let me fuck you properly."