If he sees her displeasure towards him, he certainly doesn't notice it in favor of cramming the rest of the donut in his mouth. He's still talking with his mouth full, too, if that makes it any better. (It's worse.)

"Why not? This place sucks hard enough anyway, you might as well enjoy it while it's here." He shrugs, as if he just doesn't care, but it's obvious he's looking for some sort of satisfaction. "Like, the best revenge is to live well, or something."