I have only ever seen this kind of family mentioned as the 'ideal' family on Mumsnet. Never, ever, ever heard of it anywhere else.
What's that all about then? Has anyone else heard of this mythical ideal family type? And why does it have to be two years 
Where has this come from? What's so aspirational about it, does anyone know? It freaks me the fuck out because it seems so obviously designed to create a couple of mini-mes given that most men are older than their wives.
Has anyone ever heard of this in RL or is it another MN only thing?