For someone who apparently had no tolerance for the occult, Quentin has rapidly becoming a believer. It's still unclear exactly what Damien wants here. Or exactly who his real target is.
Hannah talks a good game but she seems genuinely frightened of Damien, though she should really be more frightened of her niece. If Angelique would murder her own sister, I doubt that she would have any problem killing her aunt as well.
So Damien wants to tell Quentin the truth? Which would be exactly what?
The Candles of the Seven Secrets! It sounds like something that Angelique pulled out of her occult utility belt.