[action]
[As it would happen Kitty also lives in the Sector 4 apartments where Garcia lives. Of course, that's not where she slept. Sleeping—what there was of it—was done at Reid's place in Sector 2. And since she didn't bring a change of clothes with her, that means walk of shame time. And since they went to a party last night she is still sporting a tight, white dress instead of something more morning appropriate...or rain appropriate for that matter.
She isn't paying all that much attention at first, so she starts just phasing through the wall not far from Derek. Why use doors, really? But she pauses about half way through, turning her head to look at him and realizing who it is. One leg and arm has completely disappeared into the brick.]