That had to be tough sissy.
If you had an accident, I can see how. But, the instructions are very clear. "No Cumming" can not be misinterpreted. If you came, Fuck Off and Leave!
If you're still here, Nice show of orgasm control. Better let yourself get a little softer and apply more lube before you continue.
Haven't you noticed yet? Each wave gets a touch more intense...
Continue when you're ready.