司法院大法官會議第147號解釋 (J.Y. Interpretation No. 147)
Article 1001 of the Civil Code provides that spouses have a “mutual marital obligation to cohabit” absent legally justifiable reasons for not cohabiting. The Court held that a husband’s extramarital affair violates the “marital obligation of fidelity” and qualifies as a legally justifiable reason for the wife not to cohabit with the husband. Thus, the Court held that a husband’s extramarital affair releases his wife from her marital obligation to cohabit, but only for the period during which he maintains the affair.