Then, just as you feel that you are reaching the point of no return, she pushes you away.
"Sorry, but your 30 seconds are up!" she says in a way that lets you know she's very turned on by all this.
You protest that it can't have been that long.
"You were getting too close!" she says in a commanding voice.
No, you beg her, please, just a few more seconds in her wonderful pussy!