Liv went quiet for a minute, able to see the resentment and bitterness in his face, even if he managed to keep it off the front of his voice. He was more than a little tense against her, and it wasn't at all comforting. She was flying blind, not knowing the details of his or Sam's apparently horrific lives back in their world. All she had was what she knew of him now, and it wasn't his emotion that needed to be appealed to.
It was results.
"Then here, now, stop the cycle," she suddenly said with every fiber of her own conviction. In the pause between her words, a waitress showed up with the pie and coffee. She seemed to have a good idea that conversation isn't what they wanted, so she shuffled away quick. A bit of the tension broke by her presence, and Liv sighed, breaking eye contact with Dean to press a very affectionate, and very benign kiss on his shoulder before scooting the pie toward him with her free hand.
"You told me to keep you from doing something stupid. I'm just reminding you-- hating, or killing, your brother for love of Charlie would only be...stupid." She looked at him again, hoping to Christ he didn't take that the wrong way. He didn't want to be pandered or placated. He wanted her help, and that's what she was trying her best to give him.
"You told me yourself the world that happens where we come from... it doesn't matter here. It's like, one possibility out of literally millions, given what we know about this place, right? Do not let it dictate your life. You think Charlie would want that? I mean- does Sam even know?"