Yuppers, any time now, you should make sure that you have a bed ready for her, and keep a close eye on her. I would definitely watch for pacing, that would be a sure sign of labor. Hope this helps, good luck to the lady, and you too.
Are you saying she is not under a vets care? That is not a good idea. And I assume that since you are asking you are not a qualified breeder? If so, why are you letting your pet breed? Don't breed or buy when other dogs die, Don't Buy or Breed while dogs are in need. I hope she comes thrthis wonderfully and that you find great homes for those puppies, but do keep in mind that you are taking those homes from other dogs who are already here and in great need. It's a terrible, terrible problem in the U S and elsewhere worldwide. The way to show you are a loving and responsible pet owner is to spay or neuter all pets. I'm sorry to be such a lecturer, but it has to be said.