Bailey is sneaking in some time with Tuck in the nursery when Alex finds her. She uses Tuck to try and shoo him away with an adorable little wave, but Alex pulls up a tiny chair and tells her about his brother. Bailey carries on the whole conversation through little Tuck, telling him she didn't know Alex had a brother, did he? Tuck stays quite silent through the whole thing, more interested in his blocks than in Aaron's potential pro bono surgery. Bailey laughs at the suggestion and tells Tuck/Alex that she has a ton of surgeries to schedule which leaves little time for her to perform a free surgery but Alex tells her he'll schedule her surgery for a week, then ups it to two weeks and then a month when she keeps playing with Tuck without giving him an answer. She agrees to do it, and after he leaves she tells Tuck that she would have just done the surgery, but then Alex just kept talking!
Lexie goes down to find Mr. Clark after surgery and tells him that Mrs. Clark came through with flying colors, and they got all of her tumor out. He's so relieved he gets teary as he thanks her, and admits that his wife is always telling him to be more manly about these things. She's the one with cancer yet she's afraid he's the one that won't make it. It's sweet until you think about it for too long -- come on, dude, don't make your cancer-stricken wife care for you on top of herself. But she's great and I'm sure nothing is going to go horribly and surprisingly wrong as Lexie asks if he wants to go see her.
Bailey is shocked that Aaron took so long to have his bump looked at, but he just tells her that Karevs are tough, which will happen after five years in foster care. Bailey and Mere are both incredibly surprised to hear that, and even more so when they hear that Alex was in approximately 17 different foster homes over the course of five years, on account of his mom having serious issues and no meds to help her, and his dad being a monster. As is still the case, Alex could be hard to deal with if you didn't know him, so no one wanted to keep him. The surprise doesn't end there, but grows even more when Aaron mentions that Alex was sent to Juvenile Hall around age 11 for stealing food when their mom forgot to buy it for them. [He's just like Jean Valjean -- Angel]The man himself walks in with a question for Bailey and they fall silent, and between that and their faces Alex realizes Aaron has been talking about him and orders him to stop. Bailey just sends him back to work and then, over Mere's light protest, asks Aaron to go on enlightening them, as everything about Alex's tough personality is now falling into place.