Congrats to the pair of them, seem like a nice grounded couple, who like to keep Buster out of the spotlight as much as possible: ie this announcement isn't an OK exclusive...
Storyline-wise, I wonder if Twitter presence affects the announcement? Emma Atkins wasn't on Twitter, so wouldn't tweet about pregnancy, so it was fairly easy to keep her exit under wraps (although we'd all guessed) - I wonder if this means we'll have a bombshell exit (ie stunt death) or a "Debbie goes to prison for something nut job Emma does" or simply "Debbie goes to visit some long lost relative far away with the kids"