Khloe Kardashian is desperate to save her troubled brother Rob Kardashian — but at what cost?

RadarOnline.com has exclusively learned the 33-year-old expectant mom has even generously offered her younger sibling a room at her Los Angeles home — but her baby daddy Tristan Thompson isn’t having it.

personally responsible for his troubles,” an insider told Radar. “This is a grown man, for God’s sake!”

Despite Thompson, 26, taking a firm stance against housing Rob, 30 — who lived with Khloe and her now-ex-husband, Lamar Odom, for a couple years — he’s up against the odds when it comes to her loyalty.

have always had the tightest of bonds and she’s the only one he can open up to,” explained the insider.

“Rob wants to move in and Khloe’s down with that, but Tristan’s saying it’ll happen over his dead body.”

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