What does it mean when the mother did not drink alcohol before getting pregnant, but then started to drink while pregnant?

I think it's called relatedness yes that's the right word

just kidding all mother's may want something different while there pregnant when they didn't like it at all before it's a change in hormones
for example someone who used to hate fish, binge eats it while pregnant. but alcohol drinking is not accepted for any reason what's so ever it could be possible that the mother wants to binge with alcohol but that mother should really know better.

Generally travels west to east but often shifts to north and south