3 months later...
Dear Demeter,
See, it's all good. Jemima is a perfectly healthy little kitten. She looks nothing like Macavity. You're very lucky about that! And, personally, I think most cats think she's the cutest kit! I do. And Tugger knows she's Macavity's kit. Misto does too. I guess you ought to know....
Love,
Bombalurina