An extended version of the dirty talk scene in episode 4.17 - Freedom. Callie and Mark talk about Erica and then she shows up. This clip was cut from the aired version but is very telling in terms of Callie's feelings.
Derek: Meredith. I'm not going to pressure you. Take all the time Ты need. Just so Ты have all the information. But my Главная was wrecked way before Ты came into the picture. I am just now done trying to rebuild it.