Focusing on physical signs:
* Her shoulders slumped slightly, and the wrinkles around her eyes deepened as she sighed.
* Her hand trembled slightly as she reached for the teacup, her fingers brushing against the delicate china with a gentle touch.
* She sat down heavily in the armchair, her body seeming to sag with the weight of the day.
Focusing on actions or behaviors:
* She closed her eyes, the faintest of smiles playing on her lips as she drifted into a light doze.
* She spoke in hushed tones, her voice barely a whisper as she recounted the day's events.
* She glanced at the clock, her brow furrowed, and let out a weary sigh before standing up to leave.
Focusing on the environment:
* The flickering firelight danced across her face, highlighting the lines etched by years of laughter and worry.
* The ticking of the grandfather clock in the corner seemed to echo the slow, steady rhythm of her breathing.
* A quiet stillness fell over the room as she settled into the worn leather armchair, her presence a quiet comfort in the fading light.
The best option for you will depend on the specific context of your story and the character you're trying to portray.