How does Mrs. Pearson propose to spend the evening? Is her proposal acceptable to the family?

Mrs. Pearson proposes that they would have a nice family game of rummy. Then children could get the supper ready while she has a talk with their father. Then looking sharply at the family, she asks them if they have any objection. All speak in one voice that it suits them. Thus, Mr. Pearson finally…

Why did George Pearson gets astonished when Mrs. Fitzgerald calls him ‘George’? How does Mrs. Pearson make fun of him?

Mrs. Fitzgerald is their neighbour. Obviously, George Pearson is astonished when she informally calls him ‘George.’ Mrs. Pearson makes fun of him by saying that his name is, after all, George and then asks him mockingly whether he thinks he is Duke of Edinburgh.