My Afghan X came from a similar situation to what Merlot described. The bitch, a parson-russell type terrier, was about 11 years old and was 'got at' by a large dog that managed to get into the garden. They thought she was past the age of having pups

4 pups were born, very easily and she was a great mum. All the pups survived and the son kept our dog as it was the smallest and had a long coat. We got the dog as the wife wouldn't allow him in the house and they had been keeping him in the garden 24/7 (the dog, not the husband ;) ). My brother's friend lived near them and knew the large dog that was allowed to roam ;)
The other 3 pups grew HUGE compared to the mum and were smooth coated, while ours was a miniature Afghan at about 17 inches :)
Hope the Bitch in this case has a trouble free whelping and only a couple of pups.