So if she marries another man while her husband is still alive, she will be called an adulterer. But if her husband dies, she is free from this law, so she is not committing adultery if she marries another man.
A wife doesn’t have authority over her own body, but her husband does. In the same way, a husband doesn’t have authority over his own body, but his wife does.
Marriage is honorable in every way, so husbands and wives should be faithful to each other. God will judge those who commit sexual sins, especially those who commit adultery.