|First Appearance||Simple Explanation|
Katherine brought Rosabel to the clinic because Rosabel was feeling dizzy. She was seen by Gregory House, who soon figured out Rosabel was drunk from swallowing mouthwash. When House asked her why she didn't spit it out, Rosabel revealed the rather embarrassing fact that Katherine drank mouthwash as well. House offered Rosabel some coffee, but asked Katherine to reimburse him for it.