What is it about King Lear that appeals to Adeline? What connections are there to her own family?

King Lear reminds Adeline of her grandfather.

The poetry and pathos of Lear had moved me so profoundly I simply couldn’t control myself. So much of his plight seemed to mirror that of my grandfather at home. Contrary to all logic, I had the uncanny sensation that Shakespeare had actually had my Ye Ye in mind when he wrote his immortal play four hundred years earlier.

When Lear knelt in front of his evil daughter Regan to plead for his food and lodging, I saw my Ye Ye dropping to his knees to say the same terrible words to my stepmother:

Dear daughter, I confess that I am old; Age is unnecessary: on my knees I beg That you’ll vouchsafe me raiment, bed and food.