Derek's talking to Sean, Teresa's husband, and tells him that his baby has a brain contusion. (Thanks, IMDB! And no thanks to you, writers, who got really lazy about actually calling characters by their names this week!) Despite how awful that sounds, he says it's basically a bruise and only a slight one, but he'd still like to keep the baby for observation. Sean looks absolutely shell-shocked and admits he's not really absorbing anything Derek says since he's worried about his wife's surgery. He tells them he needs to be with her, and adds that Derek knows what he's doing and should just keep doing it. It's a weird response about his own baby, and Derek and Lexie seem a little wigged out by it. Lexie calls after him to ask the baby's name, and he explains that they only adopted her a week ago and were waiting to name her until they got to know her.
At that same time, Hahn paddles Teresa's heart to get a rhythm and notes to her crew that Teresa's now died twice in the past two hours, ordering them all to pick up the pace. She then glances at Mere and asks, "Quite a rush, huh?" Instead of answering, Mere looks up and sees Cristina watching in the gallery. Mark is up there too, and he comments that Hahn took his OR, and that she's pushy. But he definitely seems to admire pushy -- it's a very different tone than Cristina's as she bitterly adds that she's both pushy and rude. Mark asks if she's doing a [medical-ese] procedure and Cristina tells him she is, noting she wants to save as much lung tissue as possible, clearly put out that she's also a great surgeon on top of it. Mark assures her, "It doesn't make up for pushy and rude," and Cristina heartily agrees with him. Once again, snarky Mark actually manages to say what someone needs to hear over whatever might fly from his pants to his mouth, in yet another example of how actually awesome he is.
Alex heads into the nursery where Lexie's with the baby, and asks why she paged him. It's nice to actually see a reference back to all the time Alex spent in ob/gyn, and how it turns out he was really good at it, before that story became all about him hooking up with Addison. Lexie asks him if it's okay for her to pick up the baby, since the dad isn't there and she's been through a lot and might benefit from it. Alex answers by announcing that it's not why she paged him. "You paged me because your legs are still shaky from the other night and you're trying to work up the nerve to invite me to a friendly neighborhood on-call room." She stares, clearly busted at least on some level, and he gives her a sexy smile before she collects herself and protests that she actually paged him to ask him to tell Meredith that she had no idea they lived together. Lexie might consider at some point actually putting a few moments' thought each day towards her work, because if she worried about that half as much as she worries about Meredith, she could become a pretty great surgeon. She laments that she and Mere had been making progress, but now Meredith probably thinks she's a stalker. Wisely, Alex tells her that her issues can't be his but graciously adds, "But I am here for the sex if you need it." She repeats dryly, "If I need it," and he grins and adds, "You know you need it." Hell, after that look, I need it. She laughs as he heads back out of the nursery.
Richard walks up to Bailey, who's buried in paperwork, and asks for Callie, since she was supposed to get him some report by the end of the day. Without even looking up, Bailey hands it to him with a supremely lame excuse that Callie asked her to pass it along and she must have just forgotten. He looks it over and notes with some surprise that it's really good work. Bailey thanks him and then catches herself and agrees. Like in so many secret storylines we've seen, she does a hellacious job of covering. But Richard seems to be one of the first people to actually pick up on the awkwardness and sense that something's not right.