What is the fee for overtime and what does that include?

From experience, it sometimes happens that I’m wanted to stay at an event longer then originally agreed upon. – If this is the case; when my Photography service time is completed that we had originally agreed upon in the Wedding Package that you have chosen, I will tactfully mention this to you and it will be up to you to decide at this time if you would like me to stay longer to photograph. Overtime is a flat fee of $70.00 per hour.