HandjobCumOnTits

I think he loses control at 00:04, reaches the point of no return 10 seconds later (at 00:14), explodes after another 4 seconds (at 00:18) and continues cumming during 8 seconds until 00:26, when he is completely unloaded.

His orgasm lasted from the point of no return until the end of the shots, about 14 seconds, maybe extended a little more by her continuing stimulation.

She continues stimulating him after explosion for another 15 seconds (until 00:33), which is a prudential time to be sure he is completely unloaded and the orgasm has ended. 10 seconds in my opinion would be the minimum and 20 the maximum. After 20 or a little more seconds the stimulation would become unpleasant, but she stopped before.

It looks as if she knows he has lost control, in fact she slightly increases pressure and speed at 00:10, quickly driving him to the point of no return. Exactly when he reaches it, at 00:14, she increases much more the pressure and the speed, to get long cumshots.
Then she continues stimulating him for another 15 seconds, which shows she knows exactly the standard male orgasm timing. She is a true expert.