what happens at the end of the play?

Keller enters, and Mother is unable to prevent Chris from reading Larry's letter aloud. Keller now finally understands that in the eyes of Larry and in a symbolic moral sense, all the dead pilots were his sons. He says that he is going into the house to get a jacket, and then he will drive to the jail and turn himself in. A gunshot is heard in the house. Chris runs inside and tells Ann to find the doctor. Mother stays outside and moans her husband's name. Chris comes out in tears and says, "Mother, I didn't mean to-" But she interrupts him and tells him not to take the blame for his father's suicide. "Forget now. Live."