Lingaku- three horses at the same trough (idiom, alluding to Sima Yi 司马懿【Sī mǎ Yì】 and his two sons); conspirators under the same roof
Generated: This idiom is used to describe a situation where conspirators or people with shared goals or ambitions are working together, often in secrecy or with a hidden agenda.
They are working together secretly, plotting a conspiracy.