How do Cassie and her brothers react to the news of Berrys being burned?

Cassie and her brothers react with shock and disbelief.

Then he turned back to T.J. “Mr. Lanier come by real late and got Big Ma. Said Mr. Berry was low sick and needed her to help nurse him, but he ain’t said nothing ’bout no burning.” pg. 11

“Y-you mean just lit em up like a piece of wood?” stammered Christopher-John, his eyes growing big with disbelief. pg. 12