Kernrechtsfrage
Whether the father's housing expenses were proven and had to be counted in his support budget.
Extrahierter Entscheid
The father did not prove that he actually paid the alleged rent; the cantonal court could exclude it from his necessary expenses.
Extrahierte Begründung
Only actually paid amounts may be taken into account for contributive capacity. The documents did not establish that the spouses themselves paid the rent; the mother had challenged the proof, so the burden of proof remained on the father.