The Sissy Pageant Coach (A Sissy's Revenge #3)
JD Wilcox

From the moment Sam found herself locked in that plantation’s former slave quarters over six years ago, she’s plotted her revenge on that harridan. Assisting her in crossing the next name off her list is Peter, a mercenary who just might find himself warming Sam’s cold heart, though her mission always comes first.
The investigation is heating up, too. Sam’s last target had connections, including a sitting Senator. That complicates things for Special Agent Dani Ramirez whose bosses in the FBI and higher want these killings dealt with quietly. Dani might have to make a choice she never expected, and soon, because Sam’s list is long.