Well, there could be a lot of outcomes with lying, so the effect could be something such as getting caught or feeling guilty.
There are two defintions of Crepusclar:
1. Something that resembles or relates to twighlight.
2. An animal active or is appearing in twilight.
(Last sentence) Do you believe the story about the president (George Washington) who, as a boy, admitted to his father that he cut down the cherry tree?
If the example I gave is what you mean by the question, then it would be a comma. I hope this helps!
Ex:
"It gives us goosebumps",
