Lady Cressida had evidently insisted on walking home, and the rest of the church-goers had thought it their duty to accompany her.

Lily's companion looked rapidly from one to the other of the two men of the party; Wetherall walking respectfully at Lady Cressida's side with his little sidelong look of nervous attention, and Percy Gryce bringing up the rear with Mrs.
Wetherall and the Trenors.
"Ah--now I see why you were getting up your Americana!" Selden exclaimed with a note of the freest admiration but the blush with which the sally was received checked whatever amplifications he had meant to give it.
That Lily Bart should object to being bantered about her suitors, or even about her means of attracting them, was so new to Selden that he had a momentary flash of surprise, which lit up a number of possibilities; but she rose gallantly to the defence of her confusion, by saying, as its object approached: "That was why I was waiting for you--to thank you for having given me so many points!" "Ah, you can hardly do justice to the subject in such a short time," said Selden, as the Trenor girls caught sight of Miss Bart; and while she signalled a response to their boisterous greeting, he added quickly: "Won't you devote your afternoon to it?
You know I must be off tomorrow morning.

We'll take a walk, and you can thank me at your leisure.".