There are adult education classes all over the place. I teach adults and I think that one of the biggest isues is confidence, if she could just sit down and read something with someone who will help her sound out words this heelp her tremendously.
I wonder if she has ever been tested for a learning difficulty?
BBC has an excellent section on its website, SKILLSWISE that I use a lot with my students.
There are also excellent resourses available in book shops, she would need E1 or E2 level. Stress the importance of getting the foundations correct so that she can build upon them.
Hope the above is of use.
J