Either because of the shock of almost losing your identity or the simple novelty of the app, you've forgotten that the sentences it generates are mere snapshots in time. Certainly Kelsey was worried about offending you when the sentence was generated, but when she sees you messing with the app again her attitude quickly changes. She might not want to be the one messing with your reality, but she sure as hell isn't going to let you mess with hers. Of course, you're not aware of this attitude change; you don't even see her face darken into a glare. You're still busy trying to pick an option when she suddenly dives at you.
Out of sheer luck you manage to hang onto your phone just a bit longer, but you instantly know that it's going to be a losing battle. Unused to your new female body, you feel uncoordinated and awkward, and the phone begins slipping out of your hand. All you manage to do with your surprised fumbling is generate a new sentence: "Gina desperately grabs at her phone."
With a triumphant yell Kelsey tears the phone from your grasp and shoves you back. You trip and land on the ground; it hurts a little, but it also feels strange - as if you have a little more padding back there. You don't have much time to dwell on your feminine butt, though, because Kelsey is grinning at you as she works the app.
"So you were going to mess with me again, huh?" she says.
"Please, don't!" you say. "I was only going to-"
"Let's see..." she interrupts mock-thoughtfully. "I think I'll change the word 'phone'." You start to push yourself to your feet, but she confirms the changes. Suddenly, you fall back down as your hands fly to your chest. You feel an inexplicable need - no, desperation - to grope yourself, and your slender hands cup around the bulges your breasts make in your tank top. You began kneading, your fingers working at the semi-firm flesh, and an involuntary moan slips out at the strange, tingling pleasure that ripples through your body. Rather than feeling the old tightness of an erection, though, your pleasure centers on a growing warmth and wetness in your nether region. Still, you can't stop, feeling the desperate need build.