To supplement Kevin Lin's point about the Berkeley pre-PhD program, Smith College runs an analogous [post-baccalaureate program][1] that has been successful in placing students in various graduate programs. It seems a good fit for situation and aspirations of the person described:

> "This program is open to all women with a serious interest in pursuing a higher degree in the mathematical sciences."


  [1]: http://www.math.smith.edu/center/node/10