Answer: Elizabeth was quiet as she and Beck drove to Lake Charmaine to celebrate their anniversary.
Step-by-step explanation:
This is a story - Tell No One written by Harlan Coben.
It is a story of two people (Beck and Elizabeth) who have been in love since they were kids. They finally got married and they had this tradition of celebrating their anniversary at Beck's grandfather's lake - Lake Charmaine.
Elizabeth's mood on their anniversary drive can be described as "quiet".
She was quiet but according to the story, it was not unusual for her. She had this strange desolation right from a very young age where she would go quiet and drift away for a very long time.