Mariah Carey’s Pain Over Sister’s Final Years as HIV-Addled Hooker.

They added: “She also helped pay for Alison’s drug rehab as well as her treatment when she was diagnosed with HIV in the 1990s.

“But a vicious dispute over the responsibility and care of her children, her call-girl lifestyle and Alison’s attempt to write a scathing tell-all book about Mariah and the Carey family has led to an estrangement of many years.”

An insider added Carey’s sister was also stricken with deadly liver cancer while working as a call-girl while seeking male doctor clients.

And Dr Herman Kattlove, an LA-based oncologist, said about the hooker before her death: “Her immune system is severely depressed because she’s HIV-positive, so that makes her survival even more risky.

“I’d say she has only months to live.”

Another medic, Dr Gabe Mirkin, added about Carey’s agonizing final years: “HIV is an immune suppressing disease, which means her body can’t fight off the cancer cells that will invade every part of her body.”

Singer Carey was also left broken by her ex-husband Nick Cannon’s cancer diagnosis in 2012, with insiders saying her sister’s battle with the disease piled pain on her.