Why does the Duchess of Cambridge wear a Plaster on her hand, is she clumsy?

4 Will the world ever get to know so we can give it a rest?

Very recently at the Christmas day service she was seen with a transparent skin colored plaster on her left thumb. Is she practicing sewing? What is happening to Kate Middleton, the public will never know but the band-aid worn by Duchess Kate is creating quite a stir in the media, hopefully someone finds out the answer.

 Kate Middleton shaking hands
Image Source: www.ytimg.com