Do as she says
From Create Your Own Story
You tear off Sherry's panties, throwing them to the side. She falls on her back to the bed, you on top. You slowly insert your cock in her pussy, starting with the head. She moans in pleasure, fingering her clit. You pull it out, then insert just the head in again, followed by more violent fingering on Sherry's side. You repeat this several times before going deeper. She is fingering very fast and violently now, involuntarily moving her hips. You are now pumping half of your shaft in and out at a moderate speed. You get a little faster, and Sherry starts putting a finger in her pussy, while now clutching her left tit with her left hand. You pump a little bit deeper, and harder, too. She fits in another finger in her pussy above your cock. Again you speed up, followed by a third finger and some sharper moans. Finally, you pump all the way in, fast and hard as you can. Sherry somehow fits a fourth finger in, leaving her thumb to rub her clit as well. She lets out a screams as she lets out another orgasm, shaking her hips as she lets out a large spray on your dick. Must have hit the G-spot, you think. Then, out of nowhere, you start feeling a tingling in your cock and balls, followed by them expanding. What the f***? You think as your balls start to slowly swell. It all feels surprisingly good, as your balls are now expanding rapidly. By the time they stop, Sherry just happens to look down, seeing that they are the size of tennis balls! You feel the "ready to cum" feeling as the tingling intensifies.
Cum in her?