Can a pregnant cat lose the kittens but they stay inside her uterus dead?

According to cats.about.com, a cat's gestation period is 60-67 days which works out to be about 8 1/2 to 9 1/2 weeks. Another site said that even 70 days has been doented. I am guessing that she wasn't as far along as the the vet guessed when you brought her home. From your description, I would say that she will be having her babies very soon. At this stage, you should be able to feel and see the kittens moving inside her when she is laying on her side. She sounds like a lovely kitty and I hope that you can find a good home for her and her kittens. Bless you and your husband for taking her in.