MARIAH CAREY sisko rahapulassa

MARIAH CAREY is on top of the world preparing for the birth of her twins - a boy and a girl - but her down-and-out sister ALISON - a mother of four - is so strapped for cash she's selling herself as an "adult escort," The ENQUIRER has learned exclusively.



Alison Carey Scott - a former drug addict who's been arrested twice for prostitution and is also HIV positive - is shopping herself on the Long Island, N.Y., edition of backpage.com,a free internet classified service used by many hookers.



While the adult entertainment ad touts a 36-year-old sexy blonde named "Denise," The ENQUIRER learned the ad is actually for 49-year-old Alison, who charges $250 an hour for house calls. The picture is fake, natch.



"You have no idea how badly I need cash right now," a distraught Alison admitted to The ENQUIRER. "But I'm not having 'sex for money'! I provide personal companionship and erotic body rubs."



In an emotional and candid conversation, The ENQUIRER spoke to Mariah's sister when she showed up Jan. 21 to meet a male business traveler in room 431 at the Hilton Garden Inn hotel in Ronkonkoma, N.Y.



Dressed in jeans and a baggy sweater, Alison said: "I've been forced to do this because my family refuses to help me financially.



"For weeks, I was driving in a vehicle with practically no brakes. It was unsafe, so I reached out to my family for help, but they basically ignored me. I wish I didn't have to make a living by hooking up with strangers on the Internet, but sometimes I feel like I don't have any other choice."