Photon turn duration extends in runtime?

As question says, I want to change Turn Duration (of PunTurnManager), so if time run out (automatic calling method OnTurnTimeEnds, i want to extend it for another 15 seconds and then to call again OnTurnTimeEnds (some bool value will determinate if already turn duration changed). I tried to change duration in runtime but it didn’t work. Any ideas?

Looking at the PunTurnManager script, the way it checks to see if the turn is over is

void Update()
	{
		if (Turn > 0 && this.IsOver && !_isOverCallProcessed)
		{
			_isOverCallProcessed = true;
			this.TurnManagerListener.OnTurnTimeEnds(this.Turn);
		}

	}

So it looks like what you need to do is go into that script and remove the this.TurnManagerListener.OnTurnTimeEnds(this.Turn); line in Update(), and replace it with something like

if(timeExtendedBool == true) // You'll need to define this bool at the start of the script, too
{
    this.TurnManagerListener.OnTurnTimeEnds(this.Turn);
    timeExtendedBool = false;
}
else
{
    this.turnDuration += 15f;
    timeExtendedBool = true;
}