Pruni....so fucking po faced and infuriatiang!
How about this? Someone you vaguely know is pregnant,so you make all the right noises and act intersted and then say,as you do 'Do you know what you're having?'
Cue irritating smirk,shake of the head and then
'Well yes,we do, but we'd rather not say.'
Ahhhh,piss off! I was only pretending to be interested.
(We knew and didn't want to say,but would never have dreamt of being so smug,so I just smiled and said 'No,we don't.')