What Does the Kitten Think?

This is Grace, inside the house, the kitten who was abandoned by her mother.  The mother cat had five kittens all together.  So we saved Grace, and of the other four kittens, there are two survivors, as far as we know.  Perhaps one or two of them were taken in by neighbors - that's our hope.  In this photograph, Grace is looking out at her two surviving siblings, who we feed from time to time, and her mother comes by as well.  So the really big question for us is, when she looks out at the other cats, is there any imprinting in her brain, that tells her that those cats are her mother, and brother and sister?  Really interesting question, don't you think?