Amber Heard is said to be convinced that her ex-boyfriend Elon Musk, who she claimed was "controlling", gave her a bugged Tesla car, according to court documents.
The documents, seen by the Mirror, state that Heard's family friend Jennifer Howell said that the actress' late mother Paige claimed that her daughter was paranoid about the car.
Ms Howell is a non-profit founder who became close friends with Justice League star Amber's younger sister Whitney Henriquez while she was her boss from 2014 to 2016.
During that time, she also became close to the sisters' mother Paige, who has since died.
Ms Howell claims that Paige would divulge secrets about Heard's relationship with the SpaceX billionaire, who she dated after her split from Pirates of the Caribbean star Johnny Depp.
In a sworn statement provided on July 26 to Depp's lawyers, Ms Howell said:"I knew Paige Heard, Amber and Whitney’ mother.
"Paige shared with me while I was visiting Whitney that Elon Musk had gifted a Tesla or multiple Teslas (not sure if it was one or more), but Amber found out that they were 'bugged'.
"Paige told me that Amber said Elon was controlling and that she was in a legal battle with him over the rights to embryos that they had created together."
She also claimed that Paige had described Musk as "controlling" and that she said Depp was an "angel" or a "saint" compared to the technology giant.
It's claimed Paige said that she wished her daughter would reunite with Depp.
Depp, 57, is suing News Group Newspapers (NGN) over a headline in The Sun labelling him a "wife beater" over allegations he was physically abusive to his then-wife Heard.
Depp says the claims are "sick and completely untrue".
The Edward Scissorhands star has said that he was never abusive to his ex-wife and has claimed that she was the abusive one in their relationship.
He's accused her of putting out a cigarette in his face and throwing a vodka bottle that severed his finger, among other things.
Heard, 34, denies his counter claims.
The evidence has now finished and the judge's ruling is expected at a later date.
During the hearing, it was claimed that Musk would regularly visit Heard late at night while her husband Depp was away.
It's been claimed that they had an affair, but he has denied it, saying their relationship didn't begin until after she had split from the actor.
He said in a statement: "I wish to confirm again that Amber and I only started going out about a month after her divorce filing. I don't think I was ever even in the vicinity of Amber during their marriage!"