Freelancer struggles with demanding client

DEAR HARRIETTE: I’m a 26-year-old freelance writer who’s been struggling to find a steady stream of clients and projects. A few months ago, a friend generously offered to refer me to someone in his network, but they have started making demands for quick turnarounds and extra revisions beyond what was initially agreed upon. They often communicate the edit requests through my friend, so I feel unable to say no. He is a good friend, but he tends to be on the stricter side when it concerns work. I want to maintain a professional relationship as I appreciate the referral, but I need to manage my workload effectively. How can I address this client’s extra demands without jeopardizing my chance for more clients from my friend? — Freelance Client DEAR FREELANCE CLIENT: This is tricky.