What is the point of the dialogue. The writing is terrible - Shadowheart's opening statement is fine but the four response options are just ridiculous. Options 1 and 4 are worded as if the respondent knows what the doubts are. Option 2 is really poorly worded - one would ask what the doubts were rather than where they came from and option 3 is just stating the bleedin' obvious.
I thought the Dark Justiciar thing was down to choices made in the Nightsong rescue.
As for the last line, they should have left it at "forget I ever said anything". In 66 years I have never heard or read the term "thoughts best buried".