Please ask Jonah Goldberg (Linda  Victimized or Vicious) to explain why he thinks, if all Tripp wanted to do was to protect her good name, she continued to tape Lewinsky long after she would have had enough evidence for this purpose.
Goldberg thought Tripp had other motives.
Indeed, Lukas was so drawn to the story and its details that he sometimes seems to have lost his bearings, trying to read significance into every little shard of information that his research had uncovered.