Complex sentence: Dexter found out and told Harry, who punished her; hurt, Debra told Dexter that she wished that Harry had never brought him home; she was immediately remorseful for saying it, however, and apologized.
Split into simpler sentences: Dexter found out and told Harry, who punished her. Hurt, Debra told Dexter that she wished that Harry had never brought him home; she was immediately remorseful for saying it, however, and apologized.