to be a great aunt!
Just had the news that my young niece is expecting 
But it's all hush hush for now, so don't tell anyone!
My brother is delighted to be a grandad but I have mixed feelings about being a great aunt - mainly because my own great aunt was very very very old, looked scary (to me) and smelt. 
I am so very pleased for her though! I did say YOUNG niece didn't I? As in, I really will be a YOUNG great aunt!