Having already been confirmed by Kim's rep, an insider tells Us magazine, "Nobody cheated. This is just a case of conflicting schedules and their lives going in different directions."
Adding that there are no hard feelings between the E! reality star and her Saints running back ex-beau, the source tells, "It was a totally mutual decision."
Kim and Reggie started dating back in April of 2007, recently being rumored to be engaged - though Kim denied the claims, telling, "I am not engaged! The rumors about me picking out my ring already are also not true! I don't know where all this comes from!!"