Who is Jane as noted in the book, You Get So Alone at Times That It Just Makes Sense?

Jane is Chinaski's lover during much of his decade-long hiatus from writing. He describes his time with her as among the happiest of his life. They drink to excess, shout at each other through the night, barricade themselves into their room, make love, and generally live life to the hilt. He is living with her around the same time he works at the Post Office.