"Let's do this. In a few days, I'll bring up the matter of your mother and Uncle Evans's marriage to him, and get them to hurry their wedding. That way, you can officially be the Evans family's Miss."
The reason why Derek Evans didn't mention marrying Rose Campbell in all these years is because of Xaviera's mother's will. It stated that if Derek remarried before Xaviera took over the company, he would lose his current position, and all company shares would be entirely wiped out. Therefore, Rose Campbell has been by Derek Evans's side with no name and no share for years. This also made Mag Evan's status somewhat awkward.
Before Xaviera returned, they claimed that Mag was the Miss Evan, but that was merely in name only.
Moore Mamet felt his suggestion was excellent. Now, Xaviera was of no use to the Evans Group, which was under Derek Evans's control. It was time for Mrs. Campbell and him to get married.