How much more humiliation will Khloe Kardashian take?
Gorgeous brunette lawyer Polina Polonsky tells the magazine, on newsstands Wednesday, that she had a six-week affair with Lamar, 33, earlier this summer.
What's more, RadarOnline.com has learned she even passed a polygraph test regarding the claims!
Polina alleges that she and Lamar first met on June 2 at L.A.'s Roosevelt Hotel and according to her, the NBA star had been living at the plush hotel for a week, at that point, as his marriage struggled.
"I was under the impression that he had left Khloe, and that's why he was living at the Roosevelt," she explains. "He acted completely available and we definitely had a mutual attraction."
Their flirtation escalated during meetups at the Roosevelt over the next week, and by June 9, they had their first kiss.
On June 13, they consummated their relationship at Polina's apartment, she claimed.
"After we had sex, Lamar stayed the night with me," Polina told Star. "The next day we went back to the Roosevelt. I stayed there with him for the next couple of nights."
It wasn't long, Polina says, until Khloe found out. And she was not happy.
According to Polina, Lamar told her that, while looking for him, Khloe and Kris banged on the door of the wrong room. When there was no answer, she claims, outraged Khloe even broke the door in!
Lamar, disgusted by Khloe's behavior, went to stay with Polina on June 22, she says, and stayed there almost every night until July 8.
But even that hideaway offered no respite from Khloe's rage, claims Polina.
On June 25, Polina says, Khloe and Kris showed up yet again. "I couldn't believe they found where I lived and came to my apartment!" Polina explains. "They were knocking on the door, but Lamar refused to answer …"
For more on the night Khloe attacked Polina -- and how she lied to her fans as her marriage crumbled -- pick up this week's issue of Star, on newsstands now!