Complex sentence: Steward then returns to give Norma and Arthur the money, informing them that they will not know the person who next receives the offer, implying the possibility that one of them, or their young son, may be the next victim.
Split into simpler sentences: Steward then returns to give Norma and Arthur the money, informing them that they will not know the person who next receives the offer. He implies that one of them, or their young son, may be the next victim.