She said: "He saw your client lift my skirt, that's when your clients hand went out of his view because it was grabbed onto my a** cheek".
He says he didn't ask that Mueller be fired and instead requested "appropriate action be taken".
Swift had clever rhetoric against Mueller's attorney Gabe McFarland who did what he could to prove that the incident did not happen. He is seeking at least $3 million, saying the allegation cost him his job and reputation. Bell is a co-defendant.
Swift adamantly countered that claim in court.
Pop sensational and Grammy winning singer-songwriter Taylor Swift testified on 10 August how she was subjected to a "very long" and "intentional" grope by the drunk radio DJ during a "meet-and-greet" photo session after a concert in 2013.
"It was a definite grab".
"It absolutely shattered us, this incident", Andrea Swift said. Swift countersued for assault and battery, and is asking for $1.
She also said she was stunned and did not say anything to Mueller or halt the event after he left because she did not want to disappoint several dozen people waiting in line for photos with her.
After witnessing some of the most withering testimony ever given, today the jury heard from Swift's former bodyguard, Greg Dent. Her skirt went up.
Mueller claims he touched Swift's ribs while awkwardly posing for the photo - an explanation Swift categorically rejected, saying his groping was "intentional".
Swift's account was backed by testimony from others including her photographer, Stephanie Simbeck, who on Thursday said she recalled seeing Mueller "put his hand on (Swift's) butt".
The trial has attracted Swift fans.
Andrea Swift, a member of her daughter's senior management group, told the Denver federal court she knew something was wrong as soon as they returned to the "Bad Blood" singer's dressing room.
Wednesday's court proceedings were delayed by a closed evidentiary hearing that lasted almost two hours.
Mueller, then a host on the top-rated radio station KYGO, had been invited to meet the star before the show.
Mueller has testified the photo was "weird and awkward", but he touched Swift in the ribs, not in the rear.
Mueller maintains that he couldn't find a job at a top 20 market radio station after Swift's accusation and the Denver station fired him. She said she saw nothing happen during the brief encounter and that she and Mueller were rudely confronted and escorted out of the arena that evening.
U.S. District Judge William Martinez ordered jurors, spectators and the news media to leave his courtroom Wednesday so Swift's attorneys and lawyers for plaintiff David Mueller could discuss undisclosed evidentiary matters.
McFarland asked Call if the radio station had been planning to fire Mueller before the June 2 incident.
When Taylor faced Mueller's attorney during the trial, she did not miss any chance to use her sense of humor. KYGO officials said that Mueller changed his story, and they deemed that he was not being truthful. But Swift's mother said the police were not called for fear of publicity. "Did you ask yourself why Mr. Mueller would do something like this?"
Swift is now a party to an action that is taking place in the federal court system in Denver, Colorado. Eventually, though, Swift did complain, and Dent tracked down Mueller at the event. Her lawsuit makes the case that her active participation in the trial will "serve as an example to other women who may resist publicly reliving similar outrageous and humiliating acts".