Who is Selma Jassim from The Sportswriter and what is their importance?

Frank lived with Selma Jassim while he was teaching at Berkshire College. She is an Arab woman, who is teaching college courses, just until she can meet and marry a rich man who will provide her with the life she feels she deserves. Frank and Selma's relationship is uncomplicated. It is a sexual relationship with no strings attached. Frank enjoys her company and conversation, and they have long discussions on many topics, from literature to politics. Their relationship ends as simply as it began and neither attempted to contact each other again. However, after leaving Wade's house after his fight with Vicki, Frank feels the desire to hear Selma's voice. Frank calls Selma from a phone booth and asks to come see her, but Selma tells him she does not believe this is a good idea. They end the call on friendly terms.