She was afraid that maybe another scam coming after. Where to file a complaint together afterwards, it can be difficult to fight lawsuits and loss of benefits in the end.
Maybe she was afraid that the other parties will pretend that later. The subsequent prosecutions to be difficult to fight the lawsuit and impair the benefits in the end.
She was afraid that maybe the other party to deceive their later. Which will sue later may be difficult to fight the lawsuit and spoil ผลประโยชน์ใน finally.