Neutral term for a woman who is married. Can be used in general statements or descriptions.
She is a married woman, but she continues to work.
someone else's wife; another man's wife
Often used when referring to a married woman in relation to someone other than her husband, sometimes with a nuance of unavailability or taboo.
He fell in love with another man's wife.
He ended up falling in love with a married woman.
It turned out he was having an affair with someone's wife.