PRIVATE PRACTICE - "You Break My Heart" - Cooper and Charlotte take Erica to Seattle Grace to meet with Derek, Lexie and Amelia regarding a very risky surgery; Scott tells Violet that he would like to take their relationship to the next level; and Addison finds herself caught in the middle of Sam and Jake's fight about a patient. Meanwhile, Sheldon warns Sam to be cautious as he deals with the return of his sister, Corinne, on Private Practice, THURSDAY, FEBRUARY 16 (10:02-11:00 p.m., ET) on the ABC Television Network. (ABC/KELSEY MCNEAL) PATRICK DEMPSEY, CATERINA SCORSONE, A.J. LANGER, KADEE STRICKLAND, PAUL ADELSTEIN