Oh boy...it sounds like she just might have you already hooked!!
I really doubt that she is feral because she would have been very scared of you and would not have approached you. I agree with you that it is a shame that the little girl was out all alone! It does make you wonder where she came from. I don't know what to suggest but I have a feeling that we may be seeing pictures of your new baby!!!

Good luck and I hope it turns out the best for you and this little one.