Mindy (Kelly Dowdle) was the hidden main villainess from the 2017 Lifetime film Open Marriage (alternately titled To Have and to Kill; airdate January 14, 2017).
Mindy was Max's wife, and both of them were longtime friends of their next-door neighbors, Becca and Ron. However, Mindy harbored a deranged obsession with Becca, wanting to be the same as her "best friend" in every way, including having the same looks, the same personality, and even sharing her husband Ron. In Mindy's unhinged mind, her opportunity came when both Becca and Ron decided to have an open relationship with her and Max, which initially works out. However, Ron later decided to end the open marriage, having grown frustrated over seeing Max and Becca together.
Upset over the arrangement ending, Mindy began stalking Becca and Ron, trailing them in her black car. She also donned an eye mask and went to the Caligula, an underground sex club, spotting Ron with another woman, as well as seeing Max and Becca together; all of them were unaware of Mindy's presence. The villainous femme fatale took photos of them at the club and uploaded them onto the Caligula's official app, resulting in Ron being fired from his job and causing an argument between the quartet.
At the film's climax, Becca received a text from Mindy to meet her at the former's place, and when she arrives, she sees Ron tied to the bed. Mindy emerged in a lacy white gown and also pointed a gun at her, firing a warning shot whenever she or Max (who had entered the room not too long after Becca did) refused to do her bidding. As he confronted his insane wife in a heated discussion, Mindy revealed her obsession with Becca, and confessed to being the person who stalked her and took the pictures. She also expressed her pleasure over Becca deciding to open her marriage, and it was shortly afterwards that Becca, Ron, and Max gave in to Mindy's twisted demand to have yet another tryst. During their act, however, Becca attacked Mindy by hitting her in the head with a clock. A wounded Mindy looked at Becca in complete horror, but was unable to fight back as her wound turned out to be a fatal one, and ended up dying immediately after.