Sam, Dean, and Ella ditched the house right before the actual authorities showed up about a half an hour later. Dean had almost wanted to waste Katherine right then in there, the mood he was in, but in the end the all decided they'd just leave her in the hands of the police. She did kill her mother, after all, her fingerprints were on the knife she used.
When she knew Sam and Dean were asleep, she pulled the covers off of her, careful not to wake Sam. She was still wearing her clothes from earlier, so she pulled on Sam's jacket off the back of one of the chairs at the table, and pulled it on. She grabbed the motel key off the dressers and quietly slipped out the door.
Oshea was sitting in the midst of the crossroads her arms curled around the neck of a large hellhound. She stroked back its dark fur before standing to her feet and walking toward the person who had summoned her. "Make a deal or get out of here, I'm not in the mood for…" She stopped when she saw who it was and sighed. She ran a hand through her hair. "Why are you here…? You want to yell at me, too?" She whispered, crossing her arms over her chest.
"What did you do to me?" Ella partly yelled, her voice echoing throughout the vacant area.
Oshea looked up at her. "I don't know what you're talking about Ella…"
"Don't play dumb with me," She said, her voice cracking. "You did something… you poisoned me. The blood… you did something!"
"I knew it," Oshea said quietly. "I knew that I sensed something different about you. So how do you feel? Better right? Powerful? And the world didn't end… you're still Ella. Told you it wasn't a big deal…"
"Not a big deal? Not a big deal?" She threw her arms up and then let them drop to her side with a sigh. "I didn't want the demon blood, Oshea, you had no right to do that to me."
"Like I said, I don't know what you're talking about. I didn't do anything to you." Oshea said, shaking her head. "Don't you believe me? I'm you're sister…"
She scoffed. "Really? You're gonna use the sister card? I hardly even know you anymore. The things you'll do to get what you want… you don't care what lines you cross. You just do it."
Oshea stared at her a moment then shook her head, brushing tears away from her eyes. "I'm glad everyone's telling me how they really feel about me." She said with a bitter smile. "Look. I didn't do anything to you. Yes, I drank demon blood and was a demon's bitch for a while. And yeah I stole some souls from some not so nice people in this town, but I don't lie. I've not done anything to you." She turned her back and started to walk away. Ella sighed and sniffled a bit before she walked in the opposite direction.