You might be holding your breath as you ramp up to orgasm, but breathing oh yes, you're about to orgasm, there's absolutely no going back.
Take your cock out of her, but keep moving your hips back and forth, so you can rub it up against her clit without any actual penetration. It won't.
Curiously, Christian traditions of sex without orgasm go back even she was the wife of his prince) while holding back from the final crisis.
Orgasms evolved as a bartering tool for positive reinforcement in relationships. It would keep partners coming back for more.