Khloe Kardashian and Lamar Odom's marriage is under fire, with new reports that the basketball player is abusing drugs.

Multiple sources familiar with the situation told TMZ that Lamar has been using drugs for over two years. People Magazine confirmed the reports through sources, who said Odom, 32, has been using "hardcore recreational drugs" for the past two years and went to rehab last August.

"It's a really hard time for Khloé," the source said. "She's kept this secret for almost two years trying to save Lamar and their marriage."

Despite the reports, the Keeping Up With the Kardashians star took to Twitter. "Really hard to sit here and listen to people talk sh-t about my family! F-ck you and shame on you! I'm too protective for this sh-t!" Khloe wrote.

The drug allegations are the latest bombshell to rock the couple. Several weeks ago, two women came forward, claiming they carried on affairs with Lamar Odom.

Two weeks ago, attorney Polina Polonsky said she had a six-week affair with Odom. She claimed she met the Khloe & Lamar star the same night as Kim Kardashian's baby shower. Radar Online published excerpts from Polinsky's interview.

Lamar Odom's Alleged Mistress Jennifer Richardson Reveals Their Affair

Another woman, Jennifer Richardson claimed she had a yearlong affair with Odom. She spoke out about their tryst on camera. Richardson explained in a video interview -- filmed exclusively by Star magazine -- that she agreed to have a threesome with Odom.

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Lamar Odom, Khloe Kardashian