A Japanese comment on Twitter noted that Graf here isn't wearing her wedding ring, so this may have taken place before their marriage.
Apparently Ido just forgot
Admiral!
You really must take your work a little more seriously!You can't fool me!KONGOU!?It's cute.By the way, what's with the maid getup?Give that to Nagato, yeah?Eh...On the schedule for today is Murasame's strengthening practice, a patrol of the Moray Sea...W-Well, I just felt like it, so...You'd say that to anyone, wouldn't you!You're smiling up a storm there, deesu.