My RB cat Lucy got pregnant and we didn't know it. She was getting fatter and fatter and that is when we realized it. The week before she gave birth she would spend most of her time in the closet. We decided that is where she wanted to give birth so we fixed up a box for her. Then one day she was really restless, she layed in her box and had 4 beautiful babies! She was a great mother but didn't want anyone near them so she moved them under my sister's bed. After a couple of weeks we finally moved her and the babies back into the box and she allowed us to pick up and play with them.

Good luck with the babies, please please please get her fixed once the kittens are weaned!