Husband-wife privilege

civil right that protects a husband or wife from being required to testify in court against his/her spouse

Noun
1. neither spouse can divulge confidential communications from the other while they were married
(synonym) marital communications privilege
(hypernym) privilege

A special right that married persons have to keep communications between them secret and even inaccessible to a court of law. - (read more on Husband-wife privilege)