A marriage of convenience is a marriage contracted for reasons...
wikipedia - 29 Mar 2023A marriage of convenience is a marriage contracted for reasons other than that of love and commitment. Instead, such a marriage is entered into for personal gain, or some other sort of strategic purpose, such as a political marriage. There are some cases in which those married do not intend to live together as a couple, and typically got married only for one of them to gain the right to reside in a country, meaning a marriage of benefit.
