My Sisters' Birthday

People often ask me what it's like having twins for sisters and I never know what to say to them. I've never known anything else, you see, because they were here when I arrived. In fact, the babies had mum and dad run ragged when mum got unexpectedly caught with me, so in a way we've been like been triplets really. Very often there's no difference between us, except that I don't have their special bond. 

It's true, they really can know each other's thoughts, but I got prett...