OMG, what a surprise! I would be freaking out for sure especially since you didn't know she was pregnant! I have never had any kitten experience but glad others have given you advice. I can't wait until they are older and you can take some pics of them so we can see. I wonder what they look like. The fish bed will be good for the babies. A lady bought one from me at the cat show just for that purpose. Good luck Gary! Keep us updated.
Melissa