I legitimately expected this to be a Tabane plot right until the very end.
Ichika should have said, "Well, Ling didn't get her turn and Laura was cut short, so it's only fair to say Chifu-nee." Then he'd have the girls melting over him, rather than be pissed.
But Chifuyu in a maid uniform was pretty awesome. She was also super embarrassed about it in the cafeteria, equally as happy to have spent it with him after so long. We can't forget that she has a little brother complex as much as he has an older sister one.
I think Laura probably would have won. He genuinely seemed to be enjoying himself because she wasn't forcing herself on him.
...But he's her wife after all, so of course she doesn't have to force herself on him. He's already hers.