[While she was waiting, Li-Na might have gotten up to buy a latte and pastry, or she might have asked someone else to get it for her. Either way, she's finishing off said latte and pastry by the time Derek gets back.]

Thanks, Derek.

[She tosses her cup and napkin in the trash then carefully walks over to his car. The weakness hasn't come back, but she'd rather not hurt herself if it does.]