Nighttime Feedings and Engorgement!!
It's normal to have the most milk first thing in the morning. I always wondered why farmers got up so early to milk their cows around dawn. I thought I would have cows that slept late and go out and milk them at 10 am. It turns out the cows have the most milk first thing in the morning. Humans do too.
There are some of us that seem to be blessed with enough milk to feed two children no matter how we try to get our supply to decrease. What I would do is have a flannel blanket nearby. When the baby would nurse the first breast I would let the milk flow from the other breast into the blanket. If the breast was engorged I would massage a little to help get that foremilk out of there so he would get hindmilk. That should do the trick.