Plot summary
Violet and Sheldon go to a prison to evaluate some prisoners' ability to cope with life on the outside. Addison and Sam deal with a newborn baby who has a tumour wrapped around her heart. When Addison is all ready for the surgery, the oncologist on the case convinces the parents to choose chemotherapy. Amelia starts looking to Sheldon for sex, when Violet and Charlotte talk about the size of his penis and how great the sex is with him. Addison and Charlotte go head to head on the procedure both doctors want.
Cooper talks to Charlotte about having children. Violet tries to see why the inmate she got out isn't talking to her. After the mother that just gave birth to the baby falls unconscious, her husband makes the decision of going with chemotherapy. When she regains consciousness, Addison and Sam proceed to operate and are able to remove the tumour. Sheldon confesses that he wants a grown woman, not Amelia; Charlotte explains she doesn't want kids.
Credits
Adapted from Wikipedia contributors, Private Practice season 4. HTML formatting and reference markers removed.