Just cum in her mouth and not let her know?

Her tongue is massaging your cock and your balls simultaneously and you simply are at the breaking point. You thought about warning her you were going to cum, but you don't think it would matter too much for this She-Hulk of girl. The pleasure is too much and you grab her hair as your body begins build up the pressure. Her slurping sounds that were so focused on your cock just adds to the pure eroticism of the moment.

You can't hold it anymore and you CUUUUUMMMM, "oooooOHOHOOOOOOhhhhhhh myyyy gooooddddd!!!" as you dump a load in her mouth. She gives an accepting moan in reply as she hungrily takes it and swallows your load. She keeps sucking away just to make sure she got every last drop of your cum and then finished with a small popping sound as her thick lips pull off your little cock.

"Mmmm, that was yummy." she said smily looking up at you licking her lips. She brings you back down to eye level and she says, "I probably should have warned you, but I forgot myself in the moment, when I swallow cum from a man...well, it reacts to me."

"what do you mean, reacts to you?" you say confused

"well as you are about to find out," she smiles at you, "It's going to make get bigger."

"Bigger?! what do you mean, BIGGER?! Bigger muscles, Taller, Bigger cock?" you say excited w/ some fear.

"I'm going to get BIGGER everywhere, oooh I think it's starting," she said with a girlish giggle. You can just notice that her face seems to be enlarging. You focus on her mouth as it's begins to get larger and larger. RRIIIIPPP**** you hear a ripping noise and you realize she growing out of her clothes. She is getting taller too, you can feel her hands that are wrapped around your legs seem to expand more around your legs. Your cock is back with a raging erection as you witness this insane growth. You hear another loud rip and you know it's her shorts.

"Go ahead, I know you want to see how big it is," she said with a seductive look in her eyes smiling at you.

You nod nervously and look down past her awesome body and see your much higher off the ground then before. There it is, "**GASP**", you are startled by what you see. You see a cock that looks about 3 feet long and 8 inches side, but totally flaccid.

"Holy Shit! That is the biggest cock in the world" you say astonished looking down at it.

"I'm sure you would like a closer look now wouldn't you?" she said w/ a girlish giggle.

You nod like in a trance, "please let me get close to it."

"I'm pretty big all over now, and I can tell you like it, I'm probably over 12 feet tall....uhhh, maybe closer to 14 feet tall now," she says enjoying your reaction to her insane size. She gives you a big sloppy kiss.