Tris is a super popular NBA player who's team, the Cleveland Cavaliers reside in Cleveland (funnily enough).
While Khloè has been flying back and forth to visit her man, her primary home is in L.A. near her reality star fam.
Due to the long distance and Tristan's hectic work sched, the Kardashians are V concerned that Khloè will have to raise the bub mostly on her own without Tristan's help.
"You can't take a baby on the road to basketball games every night, so this baby may grow up with a father [who's around] six months a year," a Kardashian insider told Reveal.
"Everyone is happy for Khloè, and she's ecstatic but the family is concerned that she's with this guy who travels all over the country three-quarters of the year."
Despite their concerns, the Kardash squad are still pushing for a wedding.
"They all hope for a marriage announcement shortly," the insider adds.
Looks like Tristan's gonna have to prove himself to the all-powerful fam!