Kim Mathers turned herself in two days after missing her scheduled court hearings for two drunk-driving cases. Last Wednesday, Eminem’s ex-wife had two court hearings scheduled. One was a sentencing hearing in the February misdemeanour case, in which she pleaded no contest in May. The other was a probable-cause conference related to the felony drunk-driving charge stemming from her May arrest, just days after entering that plea. She did not show…