She Feared The Worst
This was a clue that was going to help her understand. However, she wanted to keep mum about it until they got home. This mother was driving, so she had to keep her focus on the road until then.
Angry As A Raging Bull
Tara decided to let it go in the meantime. However, this did not mean that she felt at peace. As a matter of fact, her grip on the steering wheel was so tight that her knuckles turned white. She was angry, and she was not going to stop until someone was held accountable for this. You did not mess with her son!