Fiona McCade: Don't stand so close to me, best friend or no

I couldn't help feeling sorry for Nicole Kidman's little sister when the siblings stepped out together on to the red carpet at an awards ceremony recently.

Antonia is 38 and looks lovely. But she looks 38, and it can't be easy trying to grow old gracefully when your older sister already appears to be half your age and getting younger by the day.

Naturally – if that's the word – I wouldn't dream of s...