Not going to say Google straight up lied to you, but I wouldn't true any AI summaries that you recieved.
From first hand experience, my wife didn't start lactating until a just before either of our children were born. They did start swelling a month or so prior, but there wasn't much until near her due date.
But I'm not sure any of that matters here.
Well, i know its not 100% accurate, and there would be variance from woman to woman. And like i also said, the amount produced before the birth is said to be quite low for majority of women. Aka., even if they start producing milk around the 4th month or later, it won't be much. The actual amount of production starts post giving birth.
Ratri isn't human, she's a cat girl. So her species gestation period might be much shorter then her human counterparts.
Don't think it would be different by that much, because even if she is a cat girl, she is still humanoid, so gestation period would probably be similar.
I mean, will normal cats do give birth faster, but they are also around the same "9" number (Cats -> around 9 weeks; Humans -> around 9 months).