In keeping with the rest of the non-Kardashian world, Tristan Thompson reveals his least favorite family member and it's a real doozy.

The Timing Isn't Ideal

A family feud may be brewing as it seems expectant mother to Thompson's baby, Khloe Kardashian, has come up against some serious resistance after floating the idea of younger brother Rob moving in with them.

Khloe is reportedly desperate to save Rob, whose troubles just seem to keep mounting following the dissolution of his relationship with baby mama, Blac Chyna. His older sis has offered her home to him, only for Thompson to put his foot down.

"He finds Rob a total weirdo, and doesn't understand why Khloe feels so personally responsible for his troubles. This is a grown man, for God's sake!" a source confirmed.

Rob lived with Khloe and her then-husband Lamar Odom for years, their odd couple dynamic forming much of the basis of spin-off reality show Khloé & Lamar.

26-year-old Thompson might be the baby daddy, but he's fighting against the odds in this case, because Khloe's loyalty to Rob is far-reaching.

"Khloe and Rob have always had the tightest of bonds and she's the only one he can open up to," explained the source.

Still, Thompson has taken a firm stance against Rob moving in and disrupting their pre-parental bliss, particularly this close to Khloe's due date. The 33-year-old is set to give birth between April and May of this year.

"Tristan's saying it'll happen over his dead body," the insider stated emphatically.

The NBA star is reportedly sick of Khloe wasting time trying to help her overweight brother. He understands she's just trying to be a supportive sister, but it doesn't help him get on board with the idea.

Facing Chyna's Wrath

Rob has been targeted by ex Chyna in a lawsuit over revenge porn photos he leaked of his baby mama, following a massive fight between the two. Chyna has since added Khloe Kardashian and Kylie Jenner to the lawsuit, too, after Rob's sisters made offensive comments about their relationship.

Khloe is the third sister to have a baby this year, following Kim, who gave birth via surrogate at the start of January. Kim and husband Kanye West welcomed daughter Chicago West, their third child together, on Jan. 15.

Likewise, 20-year-old Kylie, who was not-so-secretly pregnant, revealed her daughter, Stormi Webster, to the world following the baby's birth on Feb. 1.

Aside from Khloe, who has been trying to get pregnant for years since her difficult relationship with ex-husband Odom, the only member of the Kardashian-Jenner extended clan yet to give birth is 22-year-old Kendall. The supermodel is focused on her blossoming career and doesn't seem to be in any rush to join her sisters in becoming a mother just yet.