At the time, the gesture meant nothing to them.
After they saw the cage, they could not forget it.
When Marcus learned the full recording had survived, he stopped calling his mother a frightened helper.
He blamed her.
Food
He said she controlled the key, brought the food, and decided how much water I received.
His mother responded by claiming Marcus had threatened to put her in the cage too.
That might have sounded possible if she had not been recorded giving him advice, protecting his lies, and estimating how long I could survive.
Her fear may have been real in some moments, but it had not stopped her from using every bit of power he gave her.