Lisa Marie Presley’s soon-to-be ex-husband just filed court documents claiming that he is worried that she will relapse due to the suicide of her 27 year-old son Benjamin Keough earlier this month.

Fox News reported that Presley and Michael Lockwood are set to begin their divorce and custody trial on August 3. The pair split in 2016 after a decade of marriage, and they have 11 year-old twin daughters together. In the wake of Keough’s suicide, Lockwood filed court papers claiming that he fears Presley will return to “drug and alcohol dependency.”

Lockwood reportedly asked the court to strip the daughter of Elvis Presley of primal custody of the twins for this reason.

“Lisa Marie Presley’s son shot and killed himself in her home (Although she was not there at the time.) With all due sympathy and respect, this creates a new and unaddressed twofold problem: the safety of the children and the greater likelihood of [Presley] to relapse into drug and alcohol dependency,” Lockwood argued in the filing.

Presley was devastated when Keough shot himself fatally in her mansion in Calabasas, California earlier this month.

“She is completely heartbroken, inconsolable and beyond devastated but trying to stay strong for her 11-year-old twins and her oldest daughter Riley,” Presley said in a statement through her rep after his death. “She adored that boy. He was the love of her life.”

Presley has stayed relatively private about her battles with addiction, although she has touched on it at times.

“I was recovering after the [2008] birth of my daughters, [Harper] Vivienne and Finley, when a doctor prescribed me opioids for pain,” she once said. “It only took a short-term prescription of opioids in the hospital for me to feel the need to keep taking them.”

Keough’s close friend Brandon Howard said after his death that the 27 year-old felt pressure to live up to his family name, adding that he believes this “absolutely” contributed to his suicide.

“It’s a tough thing when you have a lot of pressure with your family and living up to a name and an image. It’s a lot of pressure,” Howard said. “It’s almost like you’re pressured into having to be a musician, having to be an actor. It was good for him to go around the world and discover himself and have his own friends. You never know what triggers it. You never know … It’s so random.”