Key legal question
Whether the wife lived in a qualified concubinage with Z. so that the husband's maintenance duty ceased
Extracted holding
The finding of qualified concubinage was arbitrary; the maintenance obligation could not be denied on that basis.
Extracted reasoning
The cantonal court relied essentially on the existence of two shared children. The file showed no additional elements of an encompassing life partnership or economic interdependence; the former cohabitation had ended and no sham residence or concrete intent to resume cohabitation was established.