It was difficult for Sam and Dean to see you like this. You were writhing on the motel room bed, sobbing, clearly in pain and your skin flushed like your cells were on fire. Your mouth was open, letting out pained whines and cries for their help. For the brothers to make it all feel better. That was the worst thing you could've said to the brothers in the moment because that just made them more guilty. Damn you. Even though you looked hot. And they wanted nothing more than to relieve your pain together.
"Dean, we can't just leave her like this." Sam muttered, gesturing to you and the picture that would be hot under any other given circumstance. You'd been hit full on by an aphrodisiac, which explained all of this. Sam blamed himself for your pain. If he'd killed the witch earlier, maybe this situation wouldn't even exist. Still, he was fighting the urge to go to you.
Dean groaned, biting his lip, hands on his hips. "This ain't a walk in the park for me either, but she's not thinkin' straight." He tapped his head, sternly looking at Sam. Probably asserting dominance as the older brother. This was an aphrodisiac of all things.
So the cure was to... you know... get it on. Dean was trying not to lose control.
"She could die." Sam leveled up the irritation scale and pinched the bridge of his nose. "She's in pain." While yes, you weren't in your right mind, the brothers had searched for a cure left and right but you were left to suffer here from a powerful aphrodisiac.
They were at a zugzwang here.