I am SO mad at her! What a horrible person! If you have the emails from her then I am sure you can find out what is going on through the police and court.
One thing that is worrying me is that maybe she took the baby from you and tried to 'sell' it on craigs list?
Thats a popular scam these days, take people's free kittens (though yours was for feeding purposes) and then 'sell' them for a fake adoption fee, saying they have their shots and are fixed etc.
Have you checked your local craigs list and have you posted on the rescue website you found her on? The people on the rescue website should know that she's a scam artist before they give her more animals.