"Lamb to the Slaughter" Mary's Giggling .

At the end of “Lamb to the Slaughter” by Roald Dahl, Mary Maloney begins giggling because the detectives ate the murder weapon that they were looking for the whole night. He husband was going to leave her I think but she was such a good actress she killed him, went to the store and fooled the detectives, all in the same night. She played it off completely. After the police leave the house, I predict Mary will just go on about her day like nothing happened and every now and then grief. But in a couple of years later she will probably re-marry and continue with her life.