I was on a Skywest UAX flight today. The Captain was female and the First Officer was male. They had the same last name. I asked and it turned out they were married.

I wonder from a Cockpit dynamic / CRM point of view, what are pluses and minuses for this situation?

Also, in the airline world, do they consider the FO working for the Captain? If that is the case, in many companies, you would not be allowed to report to your spouse.

Upon arrival at ORD, we taxied for 15 minutes. We were joking in the back that we were lost but the husband refused to stop and ask for direction

Other than the pre-departure announcement, no annoucements at all (after takeoff or before descend).