Mariah Carey's estranged sister Alison has filed a lawsuit accusing their mother Patricia of allegedly allowing strangers to sexually abuse her during Satanic rituals when she was a child.

Alison Carey, 57, has lodged documents with the State of New York Supreme Court seeking damages for "immense psychological and physical damage, mental pain and anguish and intentional infliction of severe emotion distress".

In the papers, obtained by The Sun, Alison alleges she witnessed adults engaging in "sexual acts with both adults and children" and she claims the alleged abuse took place during "middle-of-the-night satanic worship meetings that included ritual sacrifices".

Alison has been estranged from her famous sister, 50, for many years after a falling out back in the 1990s.

Mariah Carey's estranged sister Alison Carey, pictured, is suing their mother (
Image:
DouglasHealey.com / Splash News)

She previously admitted working as a prostitute after falling on hard times.

The lawsuit states: "Defendant, who is Plaintiff's mother, allowed and encouraged other male persons whose identities are at present unknown to engage in sexual acts as defined in New York Penal Law, specifically 130.52 (forcible touching), and 130.65 (sexual assault in the first degree), while Plaintiff was approximately 10 years of age.

"Defendant also forced Plaintiff to witness adults engaged in sexual acts with both adults and children during middle-of-the-night satanic worship meetings that included ritual sacrifices.

Mariah Carey, pictured left holding her daughter Monroe, and her mother Patrica, pictured right (
Image:
Twitter)

"As a result of the above Plaintiff has been diagnosed with post-traumatic stress disorder, anxiety and major depression, leading her to misuse both legal and illegal drugs in an attempt to suppress the horrific memories, and to undergo extensive professional counselling."

Alison had previously given an interview in which she talked about the Satanic rituals she was allegedly taken to as a youngster.

Speaking to The Sun Online back in 2018, she said: "The ceremonies or rituals were always between 2am and 4am and they weren’t every week as far as I can remember - just certain dates.

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"Everyone would wear long robes with black hoods and walk in twos across to this place.

"Inside they would start the rituals and they would be chanting in another language - I think Latin...

"Then terrible things would happen - things that a child should never see."

Patricia Carey has yet to comment on the lawsuit.

Mirror Online has contacted a representative for Mariah Carey for comment.