Employee’s hours change when boss adds errands to workload

DEAR ABBY: I started a new job a year and a half ago. It’s in a small office. My boss and I are the only employees. I enjoy the job very much, but there’s an aspect of it that has really started to wear on me. Increasingly, my boss has been asking me to take care of personal tasks for him that are unrelated to the business. I understand that he has no one else to rely on, but it shouldn’t be my problem. I’m a single mom with two kids, and I already have enough on my plate.