[Mouton]

Only one of the spouses can claim spousal privilege for themselves. You cannot assert someone else’s privilege.

[mewzilla]

Can both assert at the same time?

[Jim W N]

Au contrare my FRiend.

In Marital Communication Privilege, one spouse may prevent the other from testifying about confidential communications made during their marriage unless the communication was regarding joint spousal criminal activity.

[Tammy8]

I think the way it works is spouses cannot be compelled to testify against their husband/wife. If they want to testify they can waive that right.

I know of a case where a wife testified against her husband; he was convicted and sentenced to federal prison for many years. There was nothing his attorney could do to keep her from testifying.