Like Castiel, Jo receives a noncommittal half-glance before it returns to Dean. Gauging. He has the knowledge he has. Past that—no clear path exists. He can't blame anyone for their deep mistrust—he would no sooner lend credence to Voleth Meir—and Geralt's hardly about to defend Lucifer. Who both tried to kill Dean and actually killed him. 

Then whined at him about some bullshit. Fucked with his wolf. (The list is long.)

But it'd be remiss not to lay out what he's learned. The rest of them can decide or argue amongst themselves what they will or will not believe; it's Dean whose thoughts Geralt grants the most weight, Dean the one who faces becoming something he did not ask to be. Who is responsible for what happens next by his hand. The man deserves to know all there is to know. At least while his mind remains his own.

Before he can continue, the topic shifts. Geralt's gaze is sharp, though it isn't meant for Sam. If there's a point Lucifer crossed from irritating him to pissing him off in that conversation, it would be then.

"It was not an offer." It was a suggestion. "And I will not entertain it."

Insulting at best, demeaning at worst. Still, he looks at Dean—a silent question. Frankly, there's no purpose in giving voice to the notion, being what it is, but he does think Dean has the right to want to hear it.