Kendall Jenner is infatuated with Chris Brown

.Kendall Jenner is reportedly infatuated with Chris Brown.  

The 18-year-old model has fallen head-over-heels for the 'Loyal' hitmaker, 25, despite the fact he is still in a relationship with Karrueche Tran.  

A source close to the brunette beauty told Us Weekly magazine that she has become "obsessed" with the troubled R&B star, who spent 108 days behind bars for violating his probation when he allegedly made threats about using guns while seeking anger-management treatment in rehab earlier this year, after partying with him several times in recent months.  

The insider said the 'Keeping Up with the Kardashians' star went back to Chris' house in Los Angeles after the MTV Video Music Awards in August, where they "hung out with friends until 5am."  

Kendall and Chris, who was placed on five years probation after beating up his former girlfriend Rihanna in 2009, were also photographed with Trey Songz and her younger sister, Kylie Jenner, 17, at another house party in July.  

The source said that their mother Kris Jenner "hates that they're into bad boys."  

Another source claimed that their father Bruce Jenner had banned them from hanging out with Chris last month.  

The insider told OK! magazine: "Bruce doesn't want his baby girls anywhere near Chris and his friends.  

"Bruce told Kris she'd better back him in banning the girls from spending any more time with Chris Brown and that it's not negotiable."