C73 I killed the cat-faced old lady

When I arrived at the living room of the cat faced old lady, Granny Yin, the cat faced old lady, the half moon old lady had already disappeared. When did she leave? I didn't even notice when that cat-faced old lady, Granny Half Moon, left. Old Granny Yin laid under the altar with her eyes wide open. Her eyes were wide open and a knife was inserted into her chest