Arundhati Roy's novel The God of Small Things' issues on feminism?
I would focus on the difference between the grandfather and his son in the issues of feminism
These sites should be of help.
http://en.wikipedia.org/wiki/The_God_of_Small_Things
http://www.bookrags.com/The_God_of_Small_Things
http://www.gradesaver.com/the-god-of-small-things/study-guide/section5/