Sylvia takes the cup, leaving the sugar on the saucer. She likes her tea with milk, no sugar.

"A storm in a teacup," she replies, expression wry. "With any luck, it should blow over quickly."

Of course, she's saying that to reassure Elsa, but it is true. All they've heard so far is one girl declaring the existence of a Midnight coven. Time will tell if they prove to be a serious threat. Sylvia takes all such matters seriously, but she doesn't want Elsa to get too worried.