Eve was fuming, furious even. He was resisting it even when they practicly forced it down his throat. She'd try again, lock him in a room with the demon for a while maybe, try again with the vial, he'd swallow it eventually, he had to. Thats how this worked, thats how it was supposed to happen. Sam Winchester was supposed to give in to his addiction and beg for the firms help.
He was not supposed to resist.
"You should have swallowed it" she said softly "Because now you have the taste don't you, now you have the need again and that temptation, its going to break you before the night is out."
She refused to force it, or inject it or anything like that. No the point was to break him, the point was for him to give in and for that he needed to take it willingly. And he would, she was convinced of it.
He had to.
"Take a break, stew a little, get that taste back in your mind and we'll try again after a while"
She turned to her guards. "Leave him like he is, don't give him water, don't give him so much as a towel if he asks, The second he breaks and so much as takes a lick of the blood you tell me. And if he doesn't, we'll try again with that demon. All fresh, just the way he likes it"
She slapped him again for good measure and looked down at her shoes. Ruined, entirely ruined. She would need new ones before going and talking to Solo. Or he'd be smug at her. And Sam was already doing that.