My mother is a male doctor, and my uncle often asks her out to eat and sing. She came back very late and didn't come back until after five o'clock this morning.

That's a good question I think you should understand that it is normal for patients to eat and sing when they make an appointment to see a doctor. As long as there is nothing wrong, you should understand, as long as you can come back at night. Is your mother single? Understandable.