Do it, for her

You change reluctantly to her cock. Her shaft bobs silently in front of you.
She can see your hesitation. "Please, just this once. I'll be quick."
You start stroking it.
She moans with relief. "Oh, yes."
When you don't continue past stroking, though, she opens her eyes and looks at you with desperation in her eyes. "Please, just kiss it."
After a moment you nod and start kissing it. The smell of her cock skin enters your nose each time you kiss it. She smells of sex. Your kisses carry you up the side of her shaft until you are at the head. You can't help but hesitate again.
She looks down at you. "Please, don't tease me."
You stare at the head of her giant cock. It looks even more gigantic up close. The thing is almost 2 feet long and almost proportionately thick. You aren't even sure you could get the head in without being **** to bite her.
"I'm so close," she says, "Just try it."
You take a deep breath and set your resolve. It's time. You open your mouth as wide as you can and pop the head into your mouth. It feels like it fills every inch of your mouth so it's a struggle but you try your best not to bite her and start moving.
You pump her cock with both hands in the areas you can't reach. She starts moaning louder and higher, saying "Yes, yes, yes, yesh, yesh, yush."
Suddenly, she grips your head and pushes her cockhead solidly into your mouth as it suddenly expands, lodging it in your mouth as it throbs, spewing fountains of cum down your throat. The taste is amazing but you can't breathe and your poor jaw feels like its about to dislocate. She shakes and quivers, clamping her ankles behind your head. "CUMMING!" Her quim spews out tiny jets of girl cum. Herquivers act as tiny thrusts in and out of your mouth, prolonging her orgasmas she empties what feels like a gallon of cum into your throat.
The lights grow dim. You need air, but her grip is vice-like. Drowning in cum... What a way to go.