I'd certainly never ask either of the above questions to anyone :)
I am TTC# 2 and the amount of people that say 'oh, how old is your DS now - you'll be wanting a wee brother or sister for him, eh!'
I feel I am quite restrained in not saying 'I'm doing my bloody best, ok!'
I'm only on month 7 and already fed up deflecting the question...is anyone else a better liar than me? I usually sheepishly mutter something like 'oh he's only (13/14/15/16/17/)18 months, I'm sure we'll get round to it'
I actually feel bad for the question askers, they have no idea how bonkers they might be driving people. 
We were lucky enough to conceive DS in 2 months so I have only recently begun to understand the growing frustration as the months go by - I have no idea how grumpy I'll be in another few months!