"What the heck?!", she wonders as she notices the bulge grow inside her thong. Keira feels that the bulge is actually attached to her and soon realizes what it is... when it rips through her thong, tearing it apart, and springs up to level with her pussymouth. A thick, hard penis. Longer than her forearm and almost as thick as a can. Moments later, a baseball sized scrotum sprouts just beneath her cock, replacing her real vagina and dangling freely between her legs. Curious, but terrified at the same time, Keira touches the tip of her new penis, gently rubbing it. Her pussy starts pulsating, her clit stiffening and labia moistening.
This feeling frightens Keira, almost bringing her to tears, but in her state of arousal and fear, she continues to experiment nonetheless. Grabbing her cock with both hands, she gently starts rubbing her hands up and down the thick shaft. "This feels... strange, yet... absolutely wonderful!", she thinks/says, her words coming out as moans from her pussy. Rubbing even faster, she brings herself to a sudden, premature orgasm. Cumming into her pussy and all over her face, stunned, Keira falls backwards in an awkward tumble, landing on her couch.
"Ooohhhh... gross. I made this mess. I came all over my face and in this... thing. Fuck my life." Getting up, Keira doesn't realize that the remote wedged between her butt when she fell, and she pushes the random button. Her breasts suddenly expand, increasing to an impressive G cup.
"WHAAAAATT!", she "gasps", a torrent of cum drooling onto her large breasts. She takes a moment to play with her new, cum coated boobs and decides that she actually enjoys this new change to her body. She's still divided on her pussymouth and cock though, loving the pleasure they give her, but hating how unattractive they make her look. And she can't actually hide nor explain them either. In a rare moment of actual thinking, Keira reads through parts of the manual and discovers that the remote only makes her aware of the changes, whereas everyone else will believe that the changes were always existent.
Realizing this opens up plenty of possibilities, and keeps her "normal" in the eyes of others, Keira grabs the remote and presses the random button again.