Private Practice, Season 2

Charlotte:
I get what you're doing for Violet.

Cooper:
Please tell me you're not changing your mind.

Charlotte:
I get that she's your best friend, but there comes a point in time when you can't have a woman be your best friend because there's a more important woman in your life. Or should be. But you and Violet, it's intimate. And she needs you. And, I think, at the end of the day, you need her. I'm outside of it. It's your thing. Your thing with Violet. And you want me to be a part of it, but I don't have it in me to make it work that way. I'm supposed to be your best friend, Cooper.