Six Days a Week(1965)

Original title: La bugiarda

Maria, a young belle, expertly juggles three suitors at once by posing as her airline-hostess roommate, Silvana. Using fake flight schedules and carefully crafted lies, she keeps each man convinced he has her to himself. But when unexpected news about the real Silvana surfaces, Maria's carefully balanced double life spirals into a whirlwind of increasingly outrageous schemes to keep the truth from coming out.