Only you know what your body can/can not handle. If you please yourself that morning, is it possible to go twice again? I've not seen that very often, and the exception are usually 20 somethings.
I'm surprised that nobody has touched on becoming too complacent with your hand. I see this all too often; guys jack off daily or twice daily, whatever.... and now they can only come with their hands. They can't cum the more conventional ways. It can become very frustrating for the provider and you. Who wants to work and work with no real end result?
So I suggest you evaluate your particular situation, and also analyze if this is a lady you might like to see again. In other words, if you're asking a provider to perform a miracle... she may see you as a pain.
Hope you have fun, and enjoy!