UK/fem!france, amusement park!
Secretly, Arthur's a real softie.
He might act growly and gruff, and to be fair a lot of the time he is. His job is stressful, and Arthur is naturally introverted. By the time he comes home in the evenings he needs an outlet for all the stress, and Marianne is more than happy to be that outlet. All their fights generally lead to really good sex, after all.
But under the gruff, Arthur is a sweet man.
Otherwise, he never would have agreed when Marianne suggested a day out with their boys at the amusement park. He never would have spent so much money on that obviously rigged midway game, just to get Matthew that gigantic stuffed polar bear that he can hardly even carry. He never would have taken one look at Alfred's pouty face and spent another ridiculous sum to win him the matching stuffed whale.
He never would have kept going, without any provocation at all, until he could turn and hand Marianne the giant stuffed tree frog.
Marianne takes one look at his red, red face, leans over and kisses him.