As an extension to what GinnyN said, if you are there and it didn't trigger, you will most likely have to go back to an earlier save. Sometimes, the Telltale game engine is finicky about event flags.
Sanity doesn't exist. Sanity, by definition, can not be subjective; however, it is subjective. As a result, it does not fit its own definition, so it must not exist.
It seems to me that I am going slightly evil.