noun. A bedmate.

noun. One that is closely associated or allied with another.

noun. One who shares a bed with another.

noun. One who lies with another in the same bed; a person who shares one's couch.

noun. One with whom one shares a bed.

noun. An associate, often an otherwise improbable one.

noun. a person with whom you share a bed

noun. a temporary associate

"The next morning when the maid came in to make the fire, we woke up face to face in the same bed, and then she told me that her name was Belle Boyd, and I knew for the first time that my bedfellow was the South's famous female spy."