In what episode...?

Does anyone know in what episode Ninel's character Rosario gets slapped? Also which episode does Rosario and Niurka meet? And one more, I heard my gurl Sofia Vergara is going to be a guest star on the show! What episode is she in?

The reason i ask is because theres this guy on youtube that pretty much has all of the them on his site. There are too many to look through and would just be easier if i knew the number. (For example: Rosario gets slapped in episode 21. This may not be true, but you know what I mean)