Justin Bieber and Kourtney Kardashian have reportedly been hooking up months after her split from Scott Disick in July. While the pair has yet to comment on these rumors, it is believed Kris Jenner is already thrilled to hear of her eldest daughter's romance with the singer. Kim Kardashian-West, meanwhile, is grossed out.

A source told Hollywood Life that Jenner, 60, is supportive of Kardashian's, 36, newfound romance with the much younger Bieber, 21. She can totally relate to what her daughter is experiencing. After all, she is also in a relationship with Corey Gamble, who is only 35 years old.

"Kris feels like Kourtney's light hearted romance with Justin is just what the doctor ordered. She adores Justin and if he can put a smile on her daughter's face, then that's all that matters! Kourtney deserves to be happy and have some fun in her life," the source said.

The insider likewise added that Kardashian's alleged romance with Bieber is a "wake up call" to ex-boyfriend Disick.

Kardashian's "little fling" with Bieber is said to be a slap to Disick's face, another source told Hollywood Life. The 32-year-old, whom Kardashian shares three children, Mason, Penelope and Reign, is reportedly shocked to hear of his ex-girlfriend's romance with the Canadian pop star.

Disick has reportedly been trying his best to fix his family issues and that includes winning Kardashian back. However, this may seem difficult now with Bieber in the picture.

However, Disick has the support of new mom Kardashian-West when it comes to disagreeing with Bieber's romance with her sister. While Jenner may be thrilled, Kanye West's wife thinks it's totally gross for them to be together.

The 36-year-old reportedly considers Bieber a child. Kardashian having an intimate relationship with the singer would be like having a fourth child, a source told Hollywood Life in a separate report.

"Kourtney is a grown woman and can see whomever she likes. What Kim will say is that an intimate relationship between Kourt and Justin is simply gross. Justin is so young and so immature. The thought of Kourt being intimate with this little boy makes Kim sick to her stomach," the source said.

Amid the romance rumors, Bieber and the eldest of the Kardashian sisters were spotted hanging out together again on Friday, Dec. 11. The pair hit their favorite Los Angeles nightclub at The Nice Guy.