paragraph: Mrs Keswick ate supper with her guests, and behaved very well. During the evening she sustained the main part of the conversation, giving the company a great many anecdotes and reminiscences of old times and old families, relating them in an odd and peculiar way that was very interesting, especially to Croft, to whom the subject matter was quite new. But, although her three companions listened to the old lady with deferential attention, interspersed with appropriate observations, each one made her the object of severe mental scrutiny, and endeavored to discover the present object of her scheming old mind. Roberta was quite sure that her invitation and that of Mr Croft was a piece of artful management on the part of the old lady, and imagined, though she was not quite sure about it, that it was intended as a bit of match-making. To get her married to somebody else, would be, of course, the best possible method of preventing her marrying Junius; and this, she had reason to believe, was the prime object of old Mrs Keswick's existence. But why should Mr Croft be chosen as the man with whom she was to be thrown. She had learned that the old lady had seen him before, but was quite certain that her acquaintance with him was slight. Could Junius have told his aunt about the friendship between herself and Mr Croft? It was not like him, but a great many unlikely things take place. 
question: Did the guests suspect that Mrs. Keswick had ulterior motives for the dinner?
answer: No, they were oblivious to Mrs. Keswick's true intentions