Let her keep jerking you both off.
From Create Your Own Story
Kara's small hands occasionally falter, but for the most part they keep up a steady, tight, moving grip on your cocks. Her body instinctively bounces as she works both of her arms up and down, so eventually her tanktop straps fall down enough on her arms for her perky tits to pop out. "Oops," she murmurs.
Before you can think, Matt has a breast in hand; you can see him squeeze and tug at her nipple till its forced to a peak. He does the same with the other, and admist it all Kara is moaning like a pornstar.
"I'm close, man," Matt groans, looking at you for a second. You know you don't have much longer as well. "What do you wanna do?"