Ethical decadences are increasing in our contemporary society day by day. Adultery is one of the examples of moral degradation. This study investigates the present condition and consequences of adultery and finds women commit adultery with ex-lover, relative, known person and in some cases with unknown person. Social media such as: facebook, whats app, viber, imo etc. are common tools to commit adultery in now days. Lack of moral sense, degenerate culture, lack of family bonding, technological development are the main causes for committing adultery and as consequences murder, divorce, spouse violence, domestic violence, flogging, sexually transmitted diseases, honor-killing, stoning etc are the result of adultery. It conducted based on secondary resources which are collected from books, articles, newspapers and authentic websites. This study tries to describe adultery through opportunity theory where adultery is thought a result of getting more opportunity. Legal authorities can get a clear idea about the conditions and consequences of adultery which can help the government to create policy to decrease adultery in Bangladesh.