Improved Feint Partner
Knowledge of your companions’ tricks and techniques allow you to take even greater advantage of your allies’ feints.
Prerequisite: Bluff 1 rank, Combat Reflexes, Feint Partner, base attack bonus +6.
Benefit: Whenever an ally who also has this feat successfully feints against an opponent, that opponent provokes an attack of opportunity from you.
Source: Ultimate Combat, p. 105