Kernrechtsfrage
Whether the lower court wrongly allocated the income surplus by granting the husband one third of it.
Extrahierter Entscheid
The surplus must be distributed evaluatively according to the circumstances; a schematic allocation is impermissible, and the lower court did not give due weight to the wife's greater burden.
Extrahierte Begründung
Maintenance is based on actual incomes, but once a surplus exists, the judge must exercise discretion under Art. 4 ZGB. A head-count formula is only a rough starting point; concrete circumstances, including an excessive and not fully reasonable workload by one spouse, may justify a different allocation.