Complex sentence: She was forbidden to make music at all once replacement Harper Elgion arrived; in fact, her father severely beat her when she was discovered teaching her own music to the Hold children before Elgion's arrival.
Split into simpler sentences: She was forbidden to make music at all once replacement Harper Elgion arrived. In fact, her father severely beat her when she was discovered teaching her own music to the Hold children before Elgion's arrival.