Mauricio Umansky Calls Lala Kent a 'F***ing Liar' Over DM Drama

Mauricio Umansky says Lala Kent is a "f***ing liar" for the way she brought up his DM on her podcast. ICYMI ... the "Vanderpump Rules" alum spilled some tea on her "Untraditionally Lala" podcast last week, saying Kyle Richards' ex slid into her DMs…