Definitely not ethical. When a person is married, there are vows and expectations. Seducing a married woman in any context, even in fictional stories, sets a bad example. It undermines the concept of fidelity and loyalty in a relationship. Society is built on values like respect for family and marriage, and this kind of behavior is in direct opposition to those values.
It's not ethical at all. Marriage is a sacred bond. In these so - called'sex stories' that involve seducing a married woman, it goes against moral values. It's a form of disrespect for the institution of marriage and the rights and feelings of others. People should respect the boundaries of marriage and promote healthy, monogamous relationships.
No, it is completely unethical. In a marriage, there is a commitment between two people. Seducing a married woman violates the trust within that marriage and can cause great harm to many people, including the woman's spouse, children if there are any, and the woman herself.