When I say that Grandmama was wildly abusive and Teague was just far too familiar with her bullshit to respond in what might be considered a ‘proper’ way by whatever standards ‘good parents’ are held to these days, I think nothing illustrates this concept better than this particular scene, because the level of calm Teague exudes is pretty indicative of what he is used to and par for the course of what Jack expects when Grandmama pops off the handle.

“Ah, well. I’m the only one from that court who’s still alive.” She cackled. “Outlasted all the old goats, I did.”
“Well, it helps that you’ve retired to a pirate utopia,” Jack pointed out. “There’s not too many folks here trying to poke you with sharp, pointy things, are there?”
Quick as a flash, Grandmama seized her steak knife and hurled it at Jack’s head. He just managed to dodge out of the way, nearly falling out of his chair in the process.
“Now, Grandmama,” Teague said calmly. “No violence until after the soup course, please.”