Hi Vicky,
You must be living in a madhouse then with five one month old kittens running riot
Amber is lucky to have you and it's lovely you are keeping a kitten to keep her company, its always nice to try and home kittens in pairs so you would have had one left over!
I'm sure you will be on the ball with this, but to prevent another unplanned pregnancy you need to keep her in and get her spayed when her kittens are about 8 weeks old and fully weaned.
Our first foster was a pregnant queen who gave birth to her four kittens on my sofa in full view of everyone, that was a bit of a shock I can tell you as i'd been led to believe she would seek out a private corner...thank goodness for washable covers