Sally is one of the few people that know the truth about Pete -- that he wasn't out fighting Sediciosos in Mexico, but that he ran away with Maria. Unlike the others that know the truth, "Sally is completely sickened by the lies," explains executive producer, Kevin Murphy.

Go Inside Episode 2 With the Cast and Creators

"Sally is just swinging between anger and sadness and being furious with him for lying to her," adds Jess Weixler, who plays Sally McCullough. Hear what else the cast and creators have to say about Sally's new state of mind.

Plus, watch  the full episode available now on amc.com and the AMC app for mobile and devices.

The Son airs Saturdays at 9/8c on AMC. To get full episodes, behind-the-scenes video and more, sign up for the weekly Insiders Club.