This is how it goes and the transformation:

Pre-pregnant: (idealistic)

[snooty] We'll do this and this and other (insert whatever flowery wanky thing here) for our child [/snooty]

Post-birth: (bogan)

Aww little shite keeps me up all night, no time to do anything. Now where the F--- is our government payments for havin' this kid? We need a new plasma to unwind in front of while the kid is sleepin', f---'n centerlink.