Can I trust my dog to give birth alone?

No it is NOT ok to let her be alone when she gives birth. Your mom doesn't deserve to own a dog. When our female dog was getting close to giving birth we made sure that someone was always with her. We have a good friend that is a vet tech and she insisted we call her as soon as we knew puppies were coming so she could be there for her. She told us she has seen too many dogs die giving birth as well as too many pups. Somebody needs to be with her to make sure there is no problems and get her to a vet if there is. We were very lucky that our girl gave birth to 11 babies without much help, we did almost lose one baby and we would have if we hadn't been there for her.