When you're Kanye West, you're probably not too into participating in wifey Kim Kardashian's family reality TV show ... UNLESS it has some relation to The Incredibles, of course!

The rapper explains in his first-ever sit-down for KUWTK that the only reason he's doing it is because it's like one of his favorite films The Incredibles in which the wife has a "big butt" and the movie starts out with interviews. Uh, yeah, right ... we get it! Then, he says, he's just waiting for his and Kim's lives to become even more like The Incredibles' when they can all FLY!

So there's that ... and then there's the impending birth of the couple's fourth child and all the family's business commitments -- we can't believe these Kardashians can even keep up with themselves!

In the big NY Times Kardashian piece, Kim talks about her anxiety over preparing the house and the nursery for baby #4. Can you even believe the couple had time to impregnate a surrogate with all the other stuff they have going on?! Well they did -- a different gestational carrier than they used for daughter Chicago. And apparently the due date's coming right up.

ALSO, Kanye announced at his Sunday Service yesterday that he'll take the gospel worship session to Coachella this year! This is one busy family! Here's that announcement ...