She ought to have refused the invitation. Rosalie barely knew Mr. Greengrass beyond his abilities as a potioneer and the few glimpses she had of him at school. Instructing someone to fly a broom felt intimate in a sense, though Rosalie couldn't have possibly explained why she felt that way.

Still, the grin on his face was impossible not to match and she just as soon found herself agreeing. "That would be fun, sure." The frigid temperatures would be rough to contend with, but that's why warming charms had been invented.

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