I think that it probably just went to fast to suddenly for him and his knee jerk reaction was like "woah!" Hold on.

I know if someone mentioned kids to me after one date I'd be off like a shot. Not even thinking about it. Christ I don't even know if we can make it to second date and your talking about babies.!!!

That would be my reaction. Regardless of my actual intentions.

The fact he hasn't bodes pretty well I think.

I know in the US shelling our child support is a crippler, so I can imagine someone who has been there once us HYPER cautious of being there again.

I just think you need to chill a bit. Breathe. Remember also that things like kids to him don't just involve you and him, but the kids he already has.
He has ALOT to consider. And I really doubt he expected this conversation to arrive before your 2nd date.

Hope you manage to work things out. All the best.