Plot summary
Addison deals with a patient who has to choose between having a surgery that could kill one of her twins, or not perform the surgery and lose the other twin. Sam finds that Corrine is becoming more than he can handle. Violet and Scott start becoming distant, while Charlotte and Cooper begin arguing after Erica's surgery because Cooper is always at Erica's house trying to take care of her and Mason. Sheldon begins worrying that Amelia might be on drugs again, only to find out that Amelia's about twenty weeks pregnant.
Corrine has an outburst and when Sam tries to calm her down she falls through the window, forcing Sam to realize he can't take care of her. Addison performs the babies surgery just fine. Violet wants to start therapy with Pete so they can work on their marriage, and tries to show Cooper that he's taking his frustration out on Charlotte. Jake reveals to Addison that he has feelings for her, while Sheldon tries to convince Sam to put Corrine in a facility, but Sam decides he can take care of her himself.
Credits
Adapted from Wikipedia contributors, Private Practice season 5. HTML formatting and reference markers removed.