Sometime in 39, however, Caligula made public letters by his sisters Agrippina the Younger and Julia Livilla that detailed an adulterous affair with Lepidus and a plot against the emperor.[9] Lepidus was executed and Caligula's sisters were exiled. Agrippina was given the bones of Lepidus in an urn, and she carried them to Rome.[10] Caligula sent three daggers to the Temple of Mars the Avenger to celebrate the death. In the Senate, Vespasian made a motion that the remains of Lepidus be thrown away instead of buried.