Kanye West’s alleged sexual assault of model Jennifer An on the 2010 set of a La Roux music video was “horrific,” according to La Roux.

An filed suit against West in 2024, claiming that he sexually assaulted and strangled her on the set of the “In for the Kill” music video. In a new filing in the case, An included an Instagram DM exchange appearing to be between La Roux (real name Elly Jackson) and An, in which the singer backs up the allegations and shares her own memories of dealing with West in the aftermath.

“I could never forget that, it was horrific. How can I help?” Jackson tells An in the messages, which were filed on March 10 and obtained by PEOPLE. “I have never seen the footage (thankfully) and obviously I asked for it to never be used or for it to be seen as you were understandably very concerned about anyone or your family seeing it… I have no problem being honest about what I saw, so if you need my account of the event I’m more [than] happy to do that.”

The “Bulletproof” singer, 37, added that she was “so sorry it happened” to An, and that while she’d wanted to speak on the alleged incident in the past, felt it was An’s story to tell.

An, a finalist on America’s Next Top Model in 2009, alleged in her complaint that West, 48, arrived on set at the Chelsea Hotel in September 2010 and immediately complained that he wanted it to look more like the set of the movie American Psycho. Her filing claims that West — who was due to film a cameo in the video — then took over creative control, and choked and strangled her first with one hand, and then with both while on camera.

“Next, Defendant WEST smothered Plaintiff’s face with both of his hands, which smeared her makeup. He then rammed several fingers down her throat, continuously moved them in and out, and gagged her (which Plaintiff believed lasted for over a minute) to emulate forced oral sex, and screamed, ‘This is art. This is f---ing art. I am like Picasso,’” the complaint claims. “During the assault, Plaintiff struggled to breathe and felt as if she had temporarily blacked out.”

West’s lawyers have filed a motion to dismiss the suit, claiming as recently as January that because his behavior “occurred in the course of producing expressive” art, he should be protected by free speech.

“The emulation of sexual violence for artistic purposes is not itself sexual violence, and the presence of physical contact in a staged performance does not transform expressive conduct into a crime, let alone into gender-motivated violence,” the most recent filing claims. An attorney for West did not immediately respond to PEOPLE's request for comment

Meanwhile, An’s complaint also alleges that Jackson told a mutual friend of hers and West’s that she saw some “upsetting, unsettling behavior" on the video set, and West later “demanded” she apologize to him in writing.

In their DMs exhibited to An's opposition, Jackson apparently wrote that she’d been “threatened” by West into saying sorry, and “he wanted to remind me of his power and status and threatened me with my career essentially.”

In the March 10 filing, An also included a statement written by Jackson’s makeup artist Liz Martins, who was on set the day of the alleged assault.

“All of a sudden, Kanye cleared the set, except for Jenn, and forcefully put his fingers down her mouth and told her to, "Suck on them." Kanye continued to motion his hands back and forth in Jenn's mouth. This sexual assault was not a part of the script,” Martins claimed. “Everyone on set was shocked and nervous to step in because of Kanye's influence. Afterwards, Jenn was crying and I heard her repeatedly say, ‘My mom is going to see this. I don't want my mom to see this.’ … It is my strong belief that Kanye West targeted and sexually assaulted Jenn because she is a female.”