Keep throatfucking until you cum.

You keep at it for a bit longer. She is completely oblivious to her surroundings now, her only concern being getting enough air to breath.

Finally, with one last thrust you release your cum deep down her throat. The volume is so great that she cannot down all of it and it escapes from the corners of her mouth and her nose.

You pull out and let her drop on the floor, gasping for air and leaking your cum.