just keep talking to the Chicas and sooner or later, you'll find a girl that just had a baby.

I ran into one at AB, she said she just had a baby, and this was after I agreed to take her up. I was reluctant about going upstairs with her but did so, since a friend of mine had highly recommended her.
She showed me her Caesarian scar and was in fact very tight and squeezed several drops of milk out from her tits.

But this was about a year ago.
She's not at AB anymore.

join a TJ pay site and you'll get even more up to date info than what's posted here

Lactating providers are available in TJ, although I expect it takes a lot of searching and a little luck to find them.  I haven't actually gone searching for one, but have on ocassion picked a girl who turned out to be lactating.  There was one (if memory serves) at Maria Bonita, which is currently closed.