I saw this coming, and nodded when I saw the thread title. It seems that she CAN be with other cats, but they must be a bit braver than poor Mowgli. She seems a lot like my foster Pumpkin in that respect.

She is a good girl and you gave her a great start at learning how to be a much loved house cat.

You did all you could and should not be ashamed but rather PROUD of your accomplishment. She will find a wonderful home, I am certain.