Thanks everyone so much. So far nothing is happening. She's sleeping

I will for sure jump on when the action starts. Thanks for the advice on what to do if there are problems getting this one pup out. I'm hoping I won't need to, but I like to be prepared for everything. I even re-watched all 3 whelping videos I have today for the um-teenth time.
I was watching Teri Shamnsky video and one whelp they showed they said the water sak presented and the bitch napped for two hours before anything started. Is that ok? How long can the water sak present before anything happens?