Why did her boobs get like 10 times bigger compared to chapter 1

Yeah

cause for some reason she's now producing milk

I think it's cuz of the potion she drank, doesn't explain the boobs tho

Are you underage? Because that's the only way I can understand why you don't understand. But no problem, I can explain it to you. When women get pregnant, they produce milk. When their breasts fill with milk, they swell. That's why they're supposed to look bigger.

She must be producing milk for a whole village