Kris Jenner is reportedly worried her son-in-law Kanye West is ''damaging the Kardashian brand'' with his foul-mouthed outbursts on Twitter. The 'Keeping Up With The Kardashians' star is reportedly worried his foul-mouthed outbursts are affecting the reputation of her own family. A source told the New York Post's Page Six column: ''His Twitter rants are out of control, and Kris fears that he's taking the family down. ''Kris wants Kanye to hire someone to handle all the noise and drama so he can focus on being an artist.'' Meanwhile, Kanye - who has daughter North, two, and son Saint, two months, with wife Kim Kardashian West - had to come to his own defence earlier this week when he was criticised for claiming he made Taylor famous in one of his new songs.In a series of tweets, he wrote: ''I did not diss Taylor Swift and I've never dissed her ... First thing is I'm an artist and as an artist I will express how I feel with no censorship ... 2nd thin I asked my wife for her blessings and she was cool with it ... ''3rd thing I called Taylor and had a hour long convo with her about the line and she thought it was funny and gave her blessings ... 4th Bitch is an endearing term in hip hop like the word n***a (sic)''..