You're right. I nursed my youngest for 17 months--the last six months or so was exclusively at night, and my supply definitely dropped during the day at that point. That's also about where my breasts went back to normal (were no longer slightly swollen with milk all the time). After we stopped, I was dry within a couple of weeks max. And that's after almost a year and a half. No way this cow kept producing milk two months after the last "feed."