Oh man, she is just the best. I do like The Duke's conviction tho but I'm always sorry of angered by people who listen to/obey/try to reconcile with shitty family just because they're family. Like, fuck his mom.
There's something going on with her strong reaction to his words, and then her face at the end. Whatever it is she knows, she needs to tell him soon. Holding on to information like that will only make it worse.