Anticipating the arrival of kittens is indeed a happy and wonderful time. However, TCS is primarily focused on responsible cat care. A very large part of that responsibility is spay/neuter. So, while we can all certainly understand your happiness at the prospect of kittens, we hope that you will please try to understand our concerns.
If funds for spay/neuter are short and a low- or no-cost clinic is not comfortable for you, I would encourage you to look into Care Credit.http://www.carecredit.com
A know a few of our members have looked into this resource and been able to have much-needed vet care for their beloved pets.
We are here to assist you or answer any questions you may have regarding the care of your pregnant girl or the delivery of the kittens, but afterwards, the best and most responsible thing to do would be to have your girl spayed and to have your boy neutered now.
That all now being said, welcome to our Forums. We look forward to hearing more about you, your cats, and of course, the kittens when they arrive.