[she'd normally be more upset—more indignant, but the truth is, Cain does understand this a little bit. he doesn't know what was taken from him, but his life is far from fortunate, and she's called him out on that.
maybe she feels too close to get angry, after what he'd told her.
so she nods, heavily. it's in humoring Cain, because she can't quell her misery to save her own life. but she can shut up about it, at least.
she's used to being proactive instead of complaining, but alas, there's no one to murder. so she better just work out her issues.]