I can suggest is distance or just throw in a casual 'atleast your PG, so many ppl out there want to be' and see if they stop.
!
Most people outside a forum don't share what's going on with them. What ZF said is a good way to make them sit back and think for a minute. It's the same as asking the question "so when's the next one coming?". Things that should never be said.

I've said it before, I wish it was different. I think with this particular person it might be better to give it some distance for now if that's possible