The feminist standpoint revisited and other essays Book

I read the main essay (The Feminist Standpoint), which seems to be the main part of the book, here's my understanding:

-Hartsock applies Marxian class theory to argue for the relevance of Feminist Standpoint Theory.

-Marx and Engel's view that an individual is based on what they produce, not on their consumption, creates a dialectic two-class system of working (proletariat) and ruling (bourgeoise) class, similar to Hegel's Master/Slave system.

-The working class, by virtue of being those who produce for the master, are in a better position for knowing what the world needs.

-A standpoint is a socially situated collective consciousness, Hartsock indicates that socially marginalized groups (women) offer new perspectives to the ruling class (men) at the level of epistemology. The lived experience of marginalization itself, and the condition associated for the marginalization, offers a new perspective to human experience of both the ruling and working class.

-Feminist Standpoint Theory (as an epistemology) indicates that women or other marginalized populations will be in a good position to offer unique insights to knowledge because they have been oppressed, and their experience has been underrepresented by the ruling class. Her examples include poetry (Adrienne Rich) and psychoanalysis (Nancy Chodorow), but I think she should have stressed more Karen Horney.

What confuses me about feminist standpoint theory is how women can both occupy the working class or proletariat view, and in other feminist arguments women can be underrepresented or discriminated in the workplace. It makes more sense to me that Marxian theory intended men to occupy both ruling and working class in an era when women were not working, and that if this is so then a three class system is involved here? A consumer, a producer and a marginalized class? Because we are then talking about the sub-working class as the marginalized group that needs to become the working class to sway how society produces materials and knowledge. Maybe this will become clear to me after I read Marxist texts, but somehow I doubt it.