When I was a young married woman we lived in a poor area with a lot of older sisters with no car. They would go out in service then expect us to take them on errands, paying the gas bill, grocery store runs, etc. I didn't mind sometimes but they never asked, just assumed. I got tired of running a taxi service, especially if I had other plans.
One time no one showed up to unlock the hall and an older sister hadn't had time to draw her eyebrows on, so she asked me to do it for her while we were waiting. I had no idea how to do that and it gave me the creeps, ugh.