'Adulterer' in the Bible

"If anyone commits adultery with another man's wife, including when someone commits adultery with his neighbor's wife, both the adulterer and the adulteress are to die.

The adulterer watches for twilight, saying, "No eye is watching me' while he veils his face.

So while her husband is living, she will be called an adulterer if she lives with another man. But if her husband dies, she is free from this Law, so that she is not an adulterer if she marries another man.