Kernrechtsfrage
Whether the appellate court violated the ban on reformatio in peius by increasing the wife's personal maintenance despite no cross-appeal on that point.
Extrahierter Entscheid
Yes. The wife's separate maintenance claim was subject to the disposition principle, so the appellate court could not worsen the husband's position on that issue without a corresponding cross-appeal.
Extrahierte Begründung
The court distinguished child support, which is governed by official inquiry, from spousal support, which is not. Since only the husband appealed the first-instance maintenance award, increasing the spouse-only maintenance above the lower court amount breached the prohibition of reformatio in peius and thus Art. 9 BV.