Mary Winkler heard a "boom" but she said she did not pull the trigger, prompting prosecutor Walt Freeland to ask her later if she understood how a trigger worked.
"You know that pulling a trigger is what makes it go boom?" Freeland asked.
"Yes, sir," Mary Winkler replied. She said she remembered holding the gun, but not getting it from the closet.
She said she just wanted to talk to her husband, Matthew, when she went into their bedroom that day in March 2006, but she was too terrified. "He just could be so mean," she said.
But, she told Freeland, her husband did "nothing" for which he deserved to die.
Her depiction of her marriage contrasts radically with the description by the prosecution, whose witnesses described Matthew Winkler as a good father and husband. The couple's 9-year-old daughter, Patricia, testified she had a good father and she never saw him mistreat her mother.
Matthew Winkler, 31, was fatally shot in his back. A day later, his wife was arrested on the Alabama coast 340 miles away, driving the family minivan with her three young daughters inside.
Mary Winkler said she planned to return to Selmer but wanted time alone with her daughters. "All I knew was that the stupid gun had went off, and nobody would believe me and they would just take my girls away from me," she said.
Mary Winkler said despite being abused, she still loved her husband.
"I was ashamed," she said, explaining why she told no one of the abuse. "I didn't want anybody to know about Matthew."
Mary Winkler testified her husband punched her in the face, kicked her at times and refused to grant her a divorce. Shortly after they were married, "he just got me down and told me that I was his wife and we were family now, and he just screamed and hollered," she testified.
Speaking about their sex life, she spoke quietly and hesitantly, with eyes downcast. She said Matthew Winkler forced her to view pornography, dress "slutty" and have sex she considered unnatural.
The defense showed the jury a pair of white platform-heel shoes and a wig Mary Winkler said her husband wanted her to wear during sex. She described a skirt he wanted her to wear as "very, very short." Pornographic photos she identified as coming from their home computer were entered as evidence.
If convicted of first-degree murder, Mary Winkler could be sentenced to up to 60 years in prison. But defense attorney Steve Farese said the judge would decide if the jury could consider lesser charges, such as voluntary manslaughter or reckless homicide.
A psychologist testified Mary Winkler could not have formed the intent to commit a crime because of her compromised mental condition. She suffered from mild depression and post-traumatic stress disorder, which started at age 13 when her sister died and was worsened by her husband's abuse, Dr. Lynn Zager said.
Last week, prosecutors played an audiotape in which Mary Winkler acknowledged shooting her husband. She told authorities that her husband criticized her constantly and that she got tired of it and just "snapped."
"That's the problem. I have nerve now, and I have self-esteem. My ugly came out," Winkler said on the audiotape.
She told the prosecutor Wednesday she didn't know where she found that new sense of self-esteem. "I cannot tell you today the reasoning behind what I said that night," she said.
The prosecution has also said Mary Winkler was under stress because bank managers were closing in on a check-kiting scheme that she wanted to conceal from her husband. But Mary Winkler said her husband knew about the financial problems.
"We were in great debt," she said. "Nobody knew of all the credit card debt we had."