Why wasn't Emily sad when the women came after her dad's death?

Emily showed no grief because she was in denial. She wouldn't admit that he was dead.

The day after his death all the ladies prepared to call at the house and offer condolence and aid, as is our custom. Miss Emily met them at the door, dressed as usual and with no trace of grief on her face. She told them that her father was not dead. She did that for three days, with the ministers calling on her, and the doctors, trying to persuade her to let them dispose of the body. Just as they were about to resort to law and force, she broke down, and they buried her father quickly.