When playing an away game, it's up to the provider to set the rules.  If they invite me to stay, and I enjoy them, I stay.  It happens, and it's nice.  I do try to make it up in some way.

Now, it doesn't happen too often when I am in my own room.  I'd say that you are obligated to point out that the clock has run out.  If they are cozy, so be it.

If it really bothers you, then you have to insist.  You can say that you are expecting company, for example.

On the other hand, if she wants to stay, and you like the idea, enjoy the extra time.

If you booked 2 hrs and she was still comfortable after she was aware time had gone over then she was there on her dime.  Trying to charge more at this point would be upselling.  The fact that she did stay was just your good luck. Advice? recognize when she having a good time. lol
Good luck,
Doc

It is my experience that the lady is the unofficial time keeper. Kinda like she supplies the condoms. However, I also bring a little extra $, just in case Im the beneficiary of some addditional time or services. Normally if you're inclined to write a review, the simple comment "she was not a clock watcher", "a relaxed session", will suffice. You don't want to write I booked 2 hrs and got for 4hs. The rule of thumb, off menu services are not discussed in a review, because the next client shouldn't assume he will receive the same services you were so lucky to experience.

Hey good for you that you saw a cool girl that wasnt trying to run away on you! but if the guy wants the girl to leave a good thing is to get up get dressed and say Well thankyou for a wonderful time! We get the hint!

I recently had an offer to stay overnight after booking 2 hours. I was going to take her up on the offer. Unfortunatly we never even got together that night, our schedules changed, just my luck.