She gets powerful pain medication and sings soft kitty with Sheldon near the end of the episode. Howard finds Sheldon has a summons from the court for a traffic violation he did the night he was driving Penny and the date of the trial coincides with the day Stan Lee's coming to Stuart...
In "The Spoiler Alert Segmentation", Leonard suggests that he move in with Penny after he again gets exasperated with Sheldon. He asks her if she's all right with it, but she only agrees not to hurt his feelings and even tells Sheldon. When Amy confronts Penny since she can't move in...