How do you write a silly blog about daft dog antics, chaotic lads' mags photoshoots, frivolous home-decorating ideas and inane teenage banter when your younger sister has just been diagnosed with one of the most devastating and difficult to treat cancers known to man? You don't. You post a picture of next-door's new puppy peeking over the fence and get on with researching everything you can about this dreadful disease.