Janna,
If you want to approach the over production and wait on mom's diet I have a
couple more ideas. How many feedings is she doing in a row at one breast?  You
may want her to do 3-4 and only hand express the other br to relieve pressure
then wrap with cabbage and in a few days the breast should start to decrease
production. She could also add herbs such as peppermint or that family along
with fresh sage. If she wants extra birth control she could try the pill for
awhile to reduce her supply. In the LLL lactation series there is a chapter on
overproduction that has some great tips for the baby. Infant massage may help
and could be done by other members of the family. Hope this helps.
Ann Perry RN IBCLC
Boston, Mass