The villain was evil but so cartoon evil. There was nothing even about her that seemed real. Her motive for ruining this man's life, her victim, is just too ridiculous. She grieved the loss of her sister to suicide, and seeks revenge on the boyfriend. Not only does the villain target him, but also his innocent wife and child. The film dragged on a bit and that police detective has such a cool voice that it was a shame he didn't have a bigger role in this!

The setting is Philadelphia where an aspiring restauranteur, Michael Miller, has just opened a new restaurant to great fanfare. But a saboteur arrives on the scene with a methodical plan to undermine Michael's business and ruin his life. The major dramatic question is why does Suzanne Dellinger have Michael Miller in her cross hairs, and why is she targeting this poor schlub?

For the patient viewer, the motivation slowly reveals itself when we learn that Michael once had an affair with Suzanne's beloved sister, Ariel Dellinger. The cad Michael impregnated Ariel, then became callous when she clearly wanted to marry him. When he refused, the couple broke up, and Ariel eventually took her own life, memorializing the shooting on camera with the footage played by Suzanne to stoke the fires of her revenge on Michael.

Suzanne's plan is diabolical, as she disrupts his restaurant business and extorts him for $75,000. But she then continues the assault by attempting to murder Michael's wife, Catherine, and kidnaps his baby boy Evan. The lengths to which Suzanne will go at least merit acknowledgment for their creativity, placing roaches in the salads of unsuspecting diners at Michael's Bar & Grill and lacing Catherine's jug of ice tea with antifreeze.

Consciously or not, Suzanne was tapping into Michael's fundamental insecurity. He was too proud to ask his wealthy father-in-law for financial support. As a result, he foolishly taps into credit lines to pay off Suzanne without conferring with Catherine, compounding his deceit and losing the trust of his wife.

"A Sister's Revenge" explores an ongoing theme of the Lifetime films: the gullibility of a soft male husband, who refuses to tell the truth to his wife at the start, then loses her trust later. Michael should have told Catherine right away about his sordid relationship with Ariel Dellinger, and he should have told her as well about Catherine's plan to extort him. With this level of deceit, a relationship may never recover.