Cristina seeks out her husband so that she can ask him just what his, "Yeah, yeah yeah," meant and she's not happy to learn that he thinks this is just some sort of phase. He felt the same way when he was a resident but feels differently now, so he figured the two of them would talk about it again sometime in the future. She reminds him that they discussed it once, but he maintains that she'll "come around." She asks the question that's on my mind: when has he ever known her to come around? He seems to finally realize that she's serious but unfortunately the angle he takes is to tell her that it's a "young people's notion" that her career will be the only thing that ever matters. He also tells her that after all she's been through, he would have thought she'd realized this. Oh, Owen. I know you know Cristina better than to say this kind of thing to her. She's predictably miffed, but he tells her that he thought at least she'd consider what it is that he wants. She thinks a moment and then tells him evenly, "Well, I've grown up as much as I plan to and I don't come around," before leaving. And while I do think it's important for people to consider their partner's feelings and don't mean to diminish that, I am also sure that Cristina was crystal clear about this and it's Owen's bad for figuring she'd simply change her ways one day.