Khloé Kardashian and Tristan Thompson are currently gearing up to welcome their first child together, but it's not all bliss for the expectant couple as new reports indicate that Tristan is growing weary of one of his girlfriends' family members.

According to Radar Online, the NBA star, 26, is tired of Khloé, 33, trying to hopelessly help her overweight brother, Rob Kardashian. Reports indicate that she has gone as far as to offer him a room at her Los Angeles home, but her man isn't on board with the gesture, at all.

"He finds Rob [to be] a total weirdo, and doesn't understand why Khloé feels so personally responsible for his troubles," a source told the site. "This is a grown man, for God's sake!"

If Rob moves in with Khloé and Tristan, this would be the second time such a case has occurred with the siblings as the same living arrangement was set up when she was married to now ex-husband Lamar Odom.

The reality starlet is reportedly just trying to be a supportive sister, but her baller bae is completely against the idea.

"Khloé and Rob have always had the tightest of bonds, and she's the only one he can open up to," the insider continued. "Rob wants to move in and Khloé's down with that, but Tristan's saying it'll happen over his dead body."