"All right! I was only kidding; Of course, I am not going to talk about private matters to my elder brother. As long as he knows that we are married, and no miracle befell. Right Elder brother?" Ashley asks her brother with a simper on her lips.
Arthur was reluctant, and he does not know how he should act in front of his brother-in-law/boss. He still cannot consider that his sister had succeeded in marrying a billionaire.
He could still remember when Ashley was a child, she repeatedly said that she would provide a lavish living to her family when she's old enough.
So he was afraid that his sister had done something unspeakable. To accept being a mere mistress of this Japanese billionaire. Only to provide what she had promised to her family.