Rumor had it that pop star Justin Bieber started dating reality star Kylie Jenner, and things are now allegedly becoming more heated after the singer's ex found about some racy photos.

Justin Bieber Shirtless PHOTOS

On Tuesday, Hollywood Life reported that the Keeping Up With the Kardashians star was apparently sending nearly nude photos of herself to the Boyfriend singer, which caused Selena Gomez to unfollow her ex as well as Jenner on Instagram.

"Kylie sent sexy pics of herself to Justin and that's what started the fight," a source told the site. "Selena saw the pictures on Justin's phone and she freaked out and left immediately."

Kylie Jenner Cleavage PHOTO

Apparently, Gomez was good friends with Jenner and her sister Kendall, but with the alleged incident involving Bieber, the girls are reportedly not on speaking terms at this point.

"Kendall and Kylie pretty much adore Justin and he can do no bad in their eyes," a source claimed. "Selena feels like she doesn't have any support right now and it sucks."

There is a rumor that the Jenner sisters were just using the Come & Get It star to help them advertise their brand, and they weren't real friends.

"Kylie and Kendall live in such a fantasy world with what the show has turned their family into," the source added. "At the end of the day, Selena was there just to be a part of the show and enhance their brand rather than just being legit friends. Thankfully Selena realized that she was being used and got out."

Tags: Justin Bieber Kylie Jenner Selena Gomez