Shelley is the wife of Pete.
When Pete was in a car accident, Shelley was called to the hospital. She feared he had died and was surprised to learn he'd been shot. Pete needed surgery, so they gave her a moment to say goodbye before taking him. He survived the surgery and then had to be moved to ICU while the hospital was on lockdown. ("Sanctuary")
Pete was evacuated to another hospital. ("Death and All His Friends")
She is married to Pete.