Photo: Kevin Winter/Getty Images

Lisa Marie Presley (L) and musician Michael Lockwood attend the premiere of Warner Bros. Pictures' “Mad Max: Fury Road”

Lisa Marie Presley’s exMichael Lockwoodhas filed a new petition to become the guardian ad litem of their daughters amid the family’s trust battle.

Lockwood states in the legal documents that he wants to officially be appointed as the twins' guardian ad litem because “the minor is a beneficiary of a trust at issue before the probate court in the above-referenced case. The minor requires appointment of a guardian ad litem to represent her interests in the proceeding.”

“There is no conflict regarding appointment because the proposed guardian is not a beneficiary of the trust instrument at issue,” Lockwood, who welcomed Harper and Finley with Lisa Marie in October 2008, added.

Both Harper and Finley signed forms consenting to Lockwood being their guardian ad litem. A representative for Lockwood declined to comment.

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Priscilla Presley, Lisa Marie Presley and Riley Keough.Eric Charbonneau/Invision/AP/Shutterstock

Lisa Marie Presley rollout

Lockwood’s recent petition is the latest development in Lisa Marie’songoing trust battle, which exploded four days after the star’s memorial in January, when lawyers for Priscillafiled a petitionin Los Angeles questioning the “authenticity and validity” of a 2016 amendment to Lisa Marie’s living trust.

The change had removed Priscilla and Lisa Marie’s former business manager Barry Siegel as cotrustees and gave control of the trust — the Graceland mansion and a 15 percent stake in Elvis Presley Enterprises (EPE), which together brought in a reported $110 million in 2022 — to Riley, 33, and Benjamin.

Priscilla Presley and Riley Keough.Michael Kovac/Getty

Lisa Marie Presley rollout

In themost recent issue of PEOPLE, Lisa Marie’s friend claimed “there’s zero question” what her wishes were: “Lisa wanted Riley and Ben to be the trustees” — and for all her children to be the beneficiaries.

Now, as they continue to mourn the death of Lisa Marie, Riley and Priscilla are barely speaking, according to multiple sources. Said a Presley family insider: “They do not see eye to eye.”

“I can assure you, in the last seven years of Lisa’s life, she never discussed with Priscilla any business,” her friend maintained to PEOPLE, adding that before Benjamin’s death, Lisa Marie had “inquired on multiple occasions what it would take” to buy back more of a stake in EPE.

“She wanted each of her four children to have five percent of the estate,” said the friend.

RELATED VIDEO: Inside Priscilla Presley and Riley Keough’s Fight Over Lisa Marie’s Trust: ‘They Don’t See Eye to Eye’

Looking ahead, should the 2016 amendment be voided in court, Priscilla and Riley would be cotrustees.

“Priscilla doesn’t want Riley solely in charge, because then she has no say,” said the family insider. “Meanwhile, Riley doesn’t want Priscilla to butt in.”

Added the Riley source: “It’s a very sad situation. Riley is shocked Priscilla is contesting the amendment.”

In a Feb. 3 statement, Priscilla maintained she is acting with “integrity and love,” and a Lockwood source said the matriarch remains close to him to “be a part of her grandchildren’s lives.”

Ahead of the April court hearing, sources said Riley is focused on her acting career — she stars in Amazon Prime Video’s new limited seriesDaisy Jones & the Six— and Elvis' first great-grandchild. At her mother’s memorial, Riley’s stuntman husband,Ben Smith-Petersen, revealed that they had had their first child in 2022.

source: people.com