Rihanna vs. Karrueche Tran Beef: Brother Rajad Fenty Disses Chris Brown's Lover, Disturbing Sexual Racial Slur PHOTO, Twitter/Instagram 'Hate' Enough?

Several Karrueche Tran fans believe Rihanna's mega-jealous, considering the aspiring 26-year-old model is currently dating the songstress' controversial ex-boyfriend, Chris Brown. Avid #TeamNavy loyalists continue "bashing" Tran on numerous social networking sites including Instagram and Twitter. Earlier this week, RiRi's own cousin LeAndra started following Breezy's main squeeze on Instagram - but insists that she doesn't plan on bullying or harassing Tran anymore.

Now, there's this...

Another family member, Rihanna's brother Rajad R Fenty, allegedy mocked Tran with an extremely offensive racial slur via text message.

Not sure if this image is real or a hoax, but either way, still not cool...

This screenshot was recently tweeted by diehard RiRi fan, @BaddieSum. (and eventually re-posted by The Judiciary Report). Celebrity blogger Aisha claims that Fenty first shared the controversial pic on Instragam, but if so, it's since been deleted.

Tran is part-Vietnamese, so obviously this is a taunt against her Asian heritage. and quite disgusting.

And this is not the first time #TeamNavy made an offensive remark against the exotic beauty.

If this cyber feuding getting out-of-hand - considering RiRi and Tran aren't even directly involved anymore!?