Original text:
Yes their son had died and he hadn't been there for Ella in the months after Magnus's fatal car accident, aways on a series of society chores, but compared to his mentor, at least he had been there.
Corrected version:
Yes, their son had died, and he hadn't been there for Ella in the months after Magnus's fatal car accident, away on a series of society chores, but compared to his mentor, at least he had been there.