John hears how tired her voice sounds, and there's some measure of concern in his gaze as he looks at her. He's grateful she gets it. The swearing goes over his head completely so he doesn't look at all put off by that.
"It's... a big part of being telepathic. Hard to find anyone else that gets it here at least," he says quietly in agreement. He was surrounded by other people like him where he came from though there are so many problems there and so many problems he caused that he's not... he's not looking to go back even if he should.
Responsibility is a heavy weight especially when so many other lives are on the line.
He wasn't going to call her on the lie though he can feel all of the emotions swirling inside of her, can feel that she is saying so because she needs to. John has lied so much in his life, and he's shut down his own mind so deeply that even Cara couldn't read the darkest parts of it. Sometimes they deserve to get to keep some things to themselves. He understands that intensely well.
"Do... you want to talk about it?"
There's the warm, quiet tone in his voice which implies she doesn't have to.
There's no requirement. There's no expectation either.