um where has the assumption been made that this cat was rehomed or sold pregnant? are you sure this queen didn't just get out and get pregnant and she's just worked it out?? Or possibly she's a new breeder and hasn't been helped by her queen's breeder or done the proper research and is now panicking for details of what to do?? surely there are other scenarios...
to the OP check the FAB cats website on parturition and kittens. HERE :
http://www.fabcats.org/breeders/infoshe ... ition.html
Also be in contact with your vet and let them know you will be expecting soon, find out all their details for their out of hours services and be sure you have the number handy. do not hesitate to ring them at any point they are always happy to speak to you and answer questions free of charge. Also I would suggest joining the Novice Breeders list on Yahoo Groups. There are a lot of very experienced people on there that are always happy to help.
feel free to contact myself as well if you would like, I would be happy to help you. just let me know what you're stuck on. For the most part cats are fairly self sufficient in birthing but you need to be aware of the goods and bads and be ready to deal with some pretty horrible stuff.
You need to provide a nesting area and keep her confined to one room ideally where there aren't any places for her to get out of your reach or put any small kittens in danger. (i.e. down the side of a bed up against the wall, out a window, in a toilet, under a bed...)