"He's gotten this far. Seems like you did a pretty good job." If he was the protective big brother in that relationship, it's probably a pretty big deal to feel compelled to look after someone like Steve. He's definitely a guy who wouldn't make that gig too easy.

She's sure all three of them are capable of taking care of themselves, but Emma always said (and meant) the same thing about herself. When she'd first arrived in Storybrooke, she'd done what she could to look out for Mary Margaret, only for her to become a badass bandit when her memory returned. Changing dynamics are something she knows a little about, especially after the person she considered her best friend turned out to be her mom.

"Everything here slams back too hard." Including that door that caused all of this. She gets to her feet, starting for the door to give it another try. And, with this newfound knowledge about who he is, turns back after a second - "Just so you know, you're done slamming things for the day. I'd like to send you back to Steve and Peggy in one piece." She'll try the door, he can stay seated.