"See Greta's reaction to your handy-work?" She waggles her recovered fingers for emphasis, then proceeds smoothly to the elevator. "It's sure to be adorable. I mean, suit yourself. I'm sure you have a lot of important wall-writing to get to." She slips into the elevator, selects Greta's floor, and holds the door for him. She's not exactly desperate to drag Rush along into this interaction, but Greta will be happy to see her arm like this, and she'll probably want to express her gratitude and enthusiasm to him directly. And then she'll get to see her favorite Rush of all, which is the Rush who pretends he doesn't give a shit about anyone else. Bonus.