Complex sentence: Starr shoots Astrid after relapsing in a drunken jealous rage; but she survives the shooting & is then taken to MacLaren Hall ("Mack") where she stays until she goes to live with Claire.
Split into simpler sentences: Starr shoots Astrid after relapsing in a drunken jealous rage one night. She survives the shooting & is then taken to MacLaren Hall ("Mack") where she stays until she goes to live with Claire.