Did Paul's intimate family plot against him?

       Paul's sister was the mother of a son, who seems to have resided with her, probably in Jerusalem. He gave information to the chief captain of the plot to kill Paul, so that he might avoid the ambush. It may be inferred that Paul's sister was connected with some of the more prominent families. 

"But Paul’s nephew—his sister’s son—heard of their plan and went to the fortress and told Paul." Acts 23:16 NLT