Las Vegas-spree killer Stephen Paddock had a penchant for prostitutes and rough sex, a British newspaper is reporting.

Paddock unleashed bloody murder on innocent concert goers from his room at the Mandalay Bay Resort.

By the time he stopped firing, 58 people were killed and nearly 500 more were injured. As cops entered Paddock’s room, he blew his brains out.

Now, one of the prostitutes hired by gambling fanatic Paddock has come forward to reveal a man unraveling.

The 27-year-old sex worker — who would not be named — told The U.K. Sun that she spent hours drinking and gambling with Paddock.

She described the triggerman as “paranoid” and “obsessive,” often ranting for hours that the terror attacks on 9/11 were an inside job done at the behest of the U.S. government.

“If he hit a winning streak, he’d want really aggressive and violent sex, including living out his rape fantasies,” the woman told the tabloid.

She said Paddock would shell out $6,000 a session for his time with her. She showed The Sun text messages from the twisted killer, where he describes restraining her “while you scream for help.”

Paddock was reportedly a frequent flier with Sin City prostitutes, making arrangements to see them when he came into town to gamble.

Cops are now questioning prostitutes in the Nevada playground for anything that may lead them to uncover a motive for Paddock’s bloodlust.

And when he’d speak of his ex-con father — a bank robber — he’d tell the woman: “The bad streak is in my blood. I was born bad.”