Complex sentence: The reporter is greeted by Sukeena (Tsidii Le Loka) at the front door, who tells him that he is expected, (not realizing she is one of Rose Red's ghost in disguise) so Bollinger obviously enters the mansion.
Split into simpler sentences: The reporter is greeted by Sukeena (Tsidii Le Loka) at the front door, who tells him that he is expected. Not realizing she is one of Rose Red's ghost in disguise, Bollinger enters the mansion.