TAVARES, Fla. -- The Lake County mother accused of killing her son-in-law said he told her he had a pact with Satan. Lorri Worley testified Tuesday afternoon.

Worley said she stabbed Josh Blankenship after he gleefully told her about forcing her daughter to overdose on drugs and his pact with Satan. Prosecutors, though, said she killed him to keep her grandchild from being raised by who she thought was a Satan worshiper.

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With her chains on her legs, and cuffs on her hands Tuesday, Worley told a jury today about the night she shoved a knife into her son-in-law's chest.

"I said, 'You're not doing it deep enough,' and I pushed it," Worley said in court.

Her daughter had just died from an overdose of cocaine. Kelly and Josh Blankenship used to dress in all black, even at their wedding. He also had a tattoo of Satan.

The day after his wife died, Worley said Josh told her he knocked Kelly out and injected her with the drug. Worley said Josh was cutting himself, was laughing and said Kelly was going to be happy, she was going to be with Satan and he had a pact with her that he was going to go with her, too.

Worley said the words made her heart feel like it was going to explode, so she helped him kill himself. Josh was left with 50 stab wounds.

But, prosecutors made mince meat out of Worley in court. She had told investigators, the night of the crime, that Josh had threatened his baby. The baby, Wednesday, was named after the Adams Family character, but she wasn't home that night. Prosecutors theorize Worley just wanted custody of the baby.

This comes after testimony from the medical examiner who said it's highly unlikely someone could stab themself anywhere near 50 times, and from someone who recently met with Worley at the jail and said Worley confessed to murder.

Closing arguments should be Wednesday.