Show don't tell - "She waited with her sister, drinking tea, seeking reassurance."

Her sister came in with two plastic cups of tea, putting her own down before carefully handing over the other. Her sister looked at her expectantly, and she pretended to take a sip. She felt too ill to drink anything, almost too ill to move at all. Staring at corners of the room kept her grounded, kept her from falling. She couldn't help but sneak glances at the clock every now and then, but she no longer understood what the hands meant. Her sister sat back in her chair, but occasionally reached her hand over to pat her knee. She appreciated the sentiment but the contact threw off her fragile balance.