Kylie Jenner's older sisters have ordered rap star boyfriend Tyga to keep his distance from her after he was allegedly caught texting a 14-year-old model.

Hollywood Life reports it was Jenner herself who caught her much older boyfriend in the act and after word of his transgressions got to her sisters Kim, Kourtney and Kendall all came together to stand up the "Rack City" rapper once and for all.

"Kim, Kendall, and Kourtney never trusted Tyga, but they've refrained from saying 'I told you so,' because they don't want to make Kylie feel worse," a source told OK magazine.

Instead, the three are rumored to have directly texted the rapper and openly accused him of being a liar and warned him to stay away from their teenage sister.

Word is Kylie found proof of her boyfriend reaching to the high school freshmen on his phone. It's not exactly known what she told her sisters, but it was clearly enough to spark them to action.

The once seemingly inseparable couple has had more than their share of turmoil of late. The two recently split after she again suspected he was communicating with other females behind her back. That led to Kylie not being on hand to recently celebrate his 26th birthday in West Hollywood, though the two were later spotted marking the occasion at a more intimate dinner party.