Complex sentence: The hotel owner (played by George Cole's real-life wife), also realises who her mysterious guest is and highly insulted, But she agrees to play along with the story that Arthur stumbled in one night with amnesia.
Split into simpler sentences: The hotel owner (played by George Cole's real-life wife), also realises who her mysterious guest is. She is highly insulted, but she agrees to play along with the story that Arthur stumbled in one night with amnesia.