The Thorin's were lying again. It was true that they had not set the fire which killed Rina but they did make a plan to kill her. At the debutante ball which was held by the queen once a year, they planned to release some snakes and have one bite Rina.
That same ball was the one which Phoebe had led to the death of Nathaniel who was accused of sexual assault by Rina. After Rina died, the plan was scrapped.
"Let's forget it. We are all far away from the capital and have been on the road for a whole week. Who can dare to suspect us of having a hand in a fire on the Windrider estate? We have perfect alibis because we don't even need to lie about where we are." Sigrid moved her hands around, gesturing for everyone to calm. "I suggest that we all go and freshen up then return here for dinner and the viewing of three unreleased episodes of the rise of Lady Blanche."