I was fostering two pregnant cats once and they had their babies about 4 days apart. The mom who delivered first tried to steal the other mom's babies.

That was quite a fun time.

They both did great and so did all the kittens.
Then I took in another mom with two week old babies so we had three moms and 17 kittens in the house.

I kept them in three separate places... I was SO busy for those couple of months... man. It was fun, though, watching them being born and seeing them grown. I really enjoyed it.
Oh and when it was time to for them to go back to the humane society - I was not very sad! I did end up adopting one of the kittens though.. I totally fell in love with her. Unfortunately, she was sick with FIP and I had to have her PTS a month later.
I can't wait to see pics of your babies when they're born!!!!