According to the New York Post, the family will be confirming the news this weekend.
Post sources are alleging Jenner is expecting a baby girl. "She has been looking pregnant for about four months," the source said.
Jenner has been posting older photos on her Instagram and hasn't been seen at public events recently. Other pictures of her have been cropped, news.com.au reported.
Her ex Tyga, who she split from in April, Snapchatted a pic of the news and said, "Hell nah that's my kid," with a number of devil emojis.
He has since deleted it.
CNN reports that two sources close to the family have said Jenner is due in February.
Some are speculating that it is no mere coincidence this news coincides with the 10th anniversary of the clan's reality show, which airs this weekend.
Just last month, Jenner told People that she was looking forward to having children in the future.
"I do want kids," Jenner said. "Who doesn't want kids?"
And in a past episode of Keeping Up With the Kardashians, Jenner asks her parent, Caitlyn Jenner, what's the best age to have kids.
When Caitlyn Jenner replies with "30" Jenner responds, "I feel like 30 is too late".
Jenner has been with Scott since April, after her breakup with rapper Tyga. The two have matching butterfly tattoos on their ankles.
According to allure, sources say Scott has been telling his friends about the pregnancy too and how his life is going to change.
According to Popsugar, Scott attended the University of Texas before making a name for himself as a rapper and eventually dropped out to pursue his music career.
Scott, whose real name is Jacques Webster, Jr., entered the mainstream music scene in 2012 after he signed a deal with Kanye West's record label G.O.O.D Music, reports Insider.
The 25-year-old debut studio album Rodeo released in 2015 was led by the hit single, Antidote, which reached the top 20 of the US Billboard Hot 100 chart.
The rapper, singer and songwriter released his second album in 2016, Birds in the Trap Sing McKnight ,which received mostly positive reviews.
Scott is currently collaborating on an album with Quavo from the hip hop trio Migos.
