Sofia is not interested in joining the show because she is yet to create a bond with Disick's three children, who he has with reality TV star Kourtney Kardashian, reports tmz.com.
"There are absolutely zero plans for 'Keeping up with the Kardashians' to cast Sofia. While she has been with Disick a lot, she is not with him when he is around his children - Mason, Reign and Penelope," a source said.
It is also reported that Kourtney "didn't influence producers to keep Sofia off camera" as the Kardashian sisters don't personally know her.
The show features the Kardashian and Jenner families. Disick is also a part of the show. It centers around the day-to-day life of the whole family.