Questione giuridica chiave
Whether the cantonal court arbitrarily calculated the husband's disposable income by counting the child support twice
Decisione estratta
Yes. The previous judgment included the former 760 CHF child-support amount in the husband's charges and then deducted the newly fixed 40 CHF again.
Motivazione estratta
This was an untenable calculation under Art. 9 Cst.; correcting it increased the spouses' combined disposable income and the wife's maintenance share.