Key legal question
Whether the wife’s concubinage justified revising the maintenance contribution in divorce interim measures.
Extracted holding
The cantonal court applied the wrong legal approach: in interim measures, concubinage and its economic benefits must be taken into account even without proof of marriage-like economic advantages in the exact same sense as post-divorce maintenance cases.
Extracted reasoning
A change in circumstances after the protective-measures order existed. For interim measures under Art. 137 CC, the relevant question is whether the cohabitation creates economic advantages, such as shared housing and household costs, that may affect maintenance.