Sophia and Jemima having a chat...

When they're walking they don't look alike at all, despite being twins. Sophia is a sleek and elegant short-haired tortoishell , and generally moves fast. Jemima is fluffy, gentle, has much darker longer fur, and has a tendency to waddle. (She was named after Mrs Puddleduck).

But looking at them sharing the study window-sill earlier, I could see the resemblance.