Kernrechtsfrage
Whether the wife's undeclared secondary income could be treated as non-taxable hobby income or excused by alleged official advice.
Extrahierter Entscheid
The income was taxable employment income; no sufficient proof of a clear, unconditional official assurance was shown.
Extrahierte Begründung
The wife received an ordinary wage from an employer in an employment relationship, so hobby/love-of-the-art reasoning does not apply. The claimed reliance on tax-office advice was unproven and implausible for a long-term nondisclosure.