I am writing a fantasy novel set in a Bronze Age society. To be realistic, I had my protagonist get married at the age of sixteen, something common in primitive times. About a year and a half later, her husband divorces her because she has failed to conceive a child.

That makes her seventeen years old, an adult by her culture's standards, but still a kid by our culture's standards. I don't want anyone assuming that I'm writing YA. Will adult readers accept a teenager as a protagonist, if she acts like an adult?