I know we have to at some point, but I'm not looking forward to it, and I'm not sure how late it's ok to leave it? 
DS is 2yrs 8months, but not very clued in to the potty yet - he's not much of a talker yet and doesn't tell us when he needs a wee or poo.
DC2 is due early Oct, so I feel like if we're going to get him going, now is the time, but I'm not sure he's ready just yet. If we don't start now, the once the baby arrives we won't want to for at least 6 months I guess, so he'll be 3 and a half.
Is this very late? When do you HAVE to potty train?!