A bedfellow is a person who shares the same bed or sleeping accommodation with another person. The term can also refer to someone who is in the same group, association or organization as another person.
Usage examples
Politics: "The recent alliance between the two rival parties is certainly a strange bedfellow situation."
Business: "In a surprising move, the tech giant joined forces with a small startup, becoming unlikely bedfellows in the highly competitive market."
Sports: "The fierce rivals, who have always been on opposite sides, are now teammates on the national team - overnight, they have become bedfellows."
Celebrity Gossip: "The tabloids were abuzz with rumors of a secret romance between the two Hollywood actors, making them the newest bedfellows in the gossip columns."
Social Issues: "When environmentalists and oil company executives unite to address climate change, it shows that even the most unexpected groups can become bedfellows for a noble cause."