She did seem really stressed out today. Hopefully, her mother's attorney is discussing the details of the case with her. Assume he is since she lives with Fred W. Surely, he's given them an idea of what's going on, what to expect. Denial can be persistent, though, if she's lived a sheltered life and isn't familiar with the criminal justice system. Could be that her mom is also filling her up with a lot of false optimism, too.
But surely she has some idea of what to anticipate when she goes to these hearings. Maybe her mom is putting a lot of pressure on her or perhaps her mom's attorney isn't giving them enough information.
If all she has done her whole life is work on the farm for her mother, she may have little knowledge of the proceedings she is attending. I'm sure she has to be at them to report back to her mother. She could be totally innocent and still get scrutinized by people. The bad part is we know nothing about her. She could have been involved, totally out of the loop on the murders, or helping LE.