Karen Angle was introduced in Total Nonstop Action Wrestling (TNA) in the summer of 2007 when Samoa Joe and Kurt Angle were feuding for an all-at-once Triple Crown Championship (Kurt held the TNA World Heavyweight Championship, and Joe held the TNA X Division and TNA World Tag Team Championship). Karen was supposedly wanting to divorce Kurt, claiming that he was emotionally abusive toward both her and their children. At the Hard Justice pay-per-view, however, Karen betrayed Joe during his match with her husband, resulting in Kurt winning the Triple Crown (thus turning her heel). In the following weeks, her character began to develop into a manipulative vamp, such as when she claimed that Sting slapped her at No Surrender when, in fact, he had not. This led to Kurt and Sting losing the Tag Team titles to Team Pacman after Kurt executed the Olympic slam on Sting. Another feud then erupted between Kurt Angle and Sting in which Sting had Karen arrested for violating a restraining order and Kurt stalking Sting's son. At Genesis, Karen persuaded A. J. Styles and Tomko into helping Kurt retain the TNA World Heavyweight Championship during the tag team match for the title. In late 2007, Karen began to have issues with Booker T's wife Sharmell, claiming there was only room for one "queen" in TNA (a direct reference to Booker T's and Sharmell's last WWE gimmick, where they were self-proclaimed royalty after Booker won the 2006 King of the Ring tournament). This led to a catfight at the December 12 TNA Impact! tapings. Karen suffered a broken foot after jumping from the apron after an in-ring segment. She did not miss any time as a result of TNA's taping schedule. On the February 14, 2008 episode of Impact!, Karen was scheduled to renew her wedding vows to Kurt, but in the storyline, she was pronounced married to A. J. Styles after the priest, who had just been knocked down by Kevin Nash, awoke and married the two, mistaking Styles for Kurt. Kurt then started to emotionally attack Karen for not ending the "marriage". Later in the year, she proposed to separate from Kurt Angle (kayfabe) which Kurt Angle supported to "concentrate on his upcoming match with Samoa Joe at Lockdown". Since then, hints of a relationship with A. J. were given, after Kurt continued to ignore Karen, even having her ejected from her ringside seat at Lockdown. On the May 22, 2008 episode of Impact!, Kurt Angle asked Karen to the ring to forgive him for not performing his "husbandly duties" and to ask her to come home. Karen then left a begging Kurt in the ring after he pleaded for a second chance. At the end of Impact!, Karen came to the ring to the aid of A. J. Styles who was being beaten four on one by Booker T, Team 3D, and Tomko. After being ejected, Karen ran to the back to enlist Kurt's aid, who came out with a chair. Kurt threatened the four with the chair, only to turn around and see his estranged wife hugging a bloody AJ. Kurt freaked and hit AJ with the chair, thus prompting the four back in the ring. Team 3D held Karen up while Kurt held AJ's head, yelling at Karen, telling her this was all her fault. Kurt is quoted as saying to Karen, "This is your fault! You deceived me!" On the May 29, 2008 edition of Impact! after being assaulted backstage before his entrance, A. J. ran to the ring to help Karen only to be beat down by Team 3D and Kurt Angle for the second week in a row. Christian Cage came to the ring to aid Styles but was viciously assaulted for his trouble as well. It was then announced that at the Slammiversary pay-per-view it would be A. J. Styles one-on-one with Kurt Angle. Karen then interfered helping A. J. Styles win his match against Kurt Angle at Slammiversary 2008, turning her face again. Shortly thereafter, Angle was given her own interview segment, Karen's Angle on iMPACT. Her first interview was Kaz on July 24, 2008. On the October 9, 2008 episode of Impact!, it was announced that Karen had to step down as the host of Karen's Angle to focus on her family. Her profile and Knockout photos were taken off TNA's official website, but were put back up a few days later.