"She... did, yeah," said Katie slowly, looking down at Hermione's left hand as well. Damn. "It's... no, I wouldn't say anything, it's just... Ginny didn't really tell me it was secret, like, so I didn't... well. Congratulations."

She finished it lamely and gave Hermione a lopsided smile. "Sorry," she said after a moment. "But I won't tell anyone, I promise."