I agree with Rand. Google voice will allow you to ring several phones with one number. You can schedule times to have the phones ring or go to voice-mail. They are calling it "A number for life!". Allows you to keep the same number even if you switch the number of your business, home, or cell. You can also specify via groups which auto message the person gets, which number to call, or go straight to voice-mail. I use it for my office and it is a life saver.
https://www.google.com/voice
Congrats on the new baby. PM me if you would life more info or help setting it up.