Sore boobs=milk?

If you never get sore boobs during pregnancy, does it mean that you're less likely to be able to breastfeed?

I'm halfway through my pregnancy. My nipples are bigger and darker. I've went up 2 cup sizes. No soreness, tingling, or discomfort whatsoever.

Also, neither my mom nor my sister were able to produce milk during any of their pregnancies. So maybe it"s genetic????