Michael Lockwood, ex-husband of the late Lisa Marie Presley, finds himself on the edge of a precarious cliff concerning the family's wealth, fearing exclusion from the $75 million fortune left behind by Presley.

Lisa Marie, daughter of the King of Rock and Roll, Elvis Presley, tragically passed away due to cardiac arrest on January 12 at the age of 54.

Sources reveal to The National ENQUIRER that Lockwood, father to Lisa Marie's 14-year-old twins, Harper and Finley, is deeply concerned that the family will attempt to marginalize him, potentially using his daughters as a means to this end.

"There was no love lost between Lisa Marie and Michael at the time of her passing, and it's an open secret that Riley (Lisa Marie's eldest daughter) feels it's her responsibility to exclude him," an inside source disclosed. "It seems she has also managed to bring Priscilla (Lisa Marie's mother) over to her side."

Earlier, the family was fragmented when Priscilla objected to the changes made to Lisa Marie's trust, removing her and her business manager from the trustees' list and leaving Riley, 33, as the only trustee. Priscilla even went as far as to suggest that Lisa Marie's signature on the document was falsified.

However, it appears that Riley successfully persuaded her grandmother, Priscilla, 77, to support her in sidelining Lockwood, 61, offering a hefty sum of money under one condition - that she helps to distance Lockwood from their lives, insiders claim.

Despite this, as the twins' legal guardian, Lockwood retains control over their share of Lisa Marie's trust, estimated to be worth over $75 million.

"Riley is bothered by the fact that Michael has access to the twins' portion of the trust," an insider stated. "Priscilla was Michael's sole ally in this scenario, but Riley is pushing for her to sever ties with him and might have incentivized her to do so.

He certainly has reasons to fear finding himself out in the cold!"