Kim Kardashian is not sure whether her pregnant sister, Kylie Jenner, is old enough to take care of a baby.

Jenner, 20, is rumored to be expecting a baby with boyfriend Travis Scott and although neither of them has officially confirmed the pregnancy, she is reportedly due in February.

Kim Feels Kylie Is Too Young To Be A Mother

Kardashian is fulfilling her duty as an older sister and has expressed her concern about Jenner being too young to take on responsibilities as a mother, a source has revealed to Hollywood Life.

The source revealed that Kardashian finds herself torn between feeling threatened by the Kylie and Kendall Jenner, and wanting to pass on the torch to her younger sisters.

The source also noted that although The Keeping Up With the Kardashians star wants Khloe and Kourtney Kardashian to be successful, she does have insecurities about no longer being in the spotlight.

"She was always happy for Khloe and Kourtney's [Kardashian] success because it was always clear that she was the queen, but she does get freaked out that one day she will be irrelevant, and people will only care about Kylie and Kendall," the insider said to the publication.

The source also pointed out that there are times when Kardashian is thankful that her sisters are drawing away all the attention from her, allowing her to live her life normally and concentrate on her duties as a wife and a mother.

"And then there's the big sister part of her that worries that Kylie is just too young to be a mom," the source added.

Kylie To Raise Baby On Her Own?

Kim's comments about Kylie being too young to welcome a baby into this world come in the wake of reports that Scott has not been spending enough time with the makeup mogul. This prompted Kanye West to talk some sense into the young rapper.

Kylie and Scott also spent New Year's Eve apart from each other so there are definitely some concerns about whether or not he will be around once the baby arrives.

There are several reports claiming that the couple has split up, but they shut down the rumors by posing for a cute picture together at Kris Jenner's Christmas party.

Kylie has been maintaining a low profile over the last few months and also went missing from another Kardashian-Jenner family photo recently, which is probably because she's prepping for the baby's arrival. There is speculation that Kylie will make her pregnancy official in an upcoming episode of their E! reality series.