In the recording shown Friday morning, Anthony told her parents her "heart is aching" because she wanted to be home with them and with Caylee. She is charged with killing Caylee in the summer of 2008. The child's body was found later that year.
If convicted, Anthony could be sentenced to death. She has pleaded not guilty. Her defense attorney says Caylee died in an accidental drowning in the family's swimming pool. The prosecution says the child was suffocated after duct tape was placed over her mouth.
Prosecutors say they expect to reach the halfway point of their case on Saturday.