Flatterie tried to get away by betraying his fellows Falsehood and Deceit but this did not work. In the end of the second part the three vices Deceit, Falsehood and Flatterie are allowed to say something before they are hanged.
In this passage, Flattery is attempting to escape by betraying his companions, Falsehood and Deceit. This attempt fails, and in the end of the second part, the three vices (Deceit, Falsehood, and Flattery) get a chance to speak before being hanged.