Owe you something

"Oh, that's right," he took a dark green kitchen towel and started to wipe down the island counter, "Mandy arrived this morning. She must have driven out to get dinner or something."

Shao Yan hesitated for a while. She had a question that she wanted to ask Li Xiqing, but she was not sure how to start the conversation.

While thinking, she unconsciously gnawed on her lower lip.

"Don't keep biting your lip like that," Li Xiqing told her, "the weather is getting colder, and your skin is getting drier too. Don't hurt your lips."

Her lips slowly curved up, "I put on some lip balm every day, don't worry," and then she stuck out her tongue to tease him.

"So uh, Xiqing," she started to say, "what should I call Mandy?"

She paused, and then before Li Xiqing could answer her, Shao Yan quickly continued. "I mean, do I just call her 'Sis' or just 'Mandy' or is there any other name that I should address her by?"