We knew the Kardashians were close, but who knew they were this close! Apparently, there's a new rumor going on that Kylie Jenner might be cheating on her boyfriend Tyga. And she's not just seeing any rapper. Reports indicate she's been spending a lot of time with French Montana, who just happens to be her sister Khloe Kardashian's ex-boyfriend.

According to Star Magazine on Tuesday, Kylie and French are raising a lot of eyebrows with their relationship, as some think they might be more than friends. Kylie herself posted several Snapchats of herself snuggling with the rapper and even sitting on his lap at one point. And while there's a good chance that they are just friends, a lot of critics are hitting back at her for hanging out with a man who is not only her sister's ex, but also much older than she is.

"Sitting on French lap," one fan wrote. "Isn't she a lil young to hanging with him??"

Another critic wrote, "That's just gross. She's hanging out with her sister's ex now? It's obvious she likes rappers, but can't she find friends her own age?" along with, "Imma call her sloppy 2nds chick hangs w everybody exs."

So far, neither Kylie nor French have made any comments about the relationship. The rapper dated Khloe back in 2014, right after she announced her divorce to her ex-husband, Lamar Odom.

And as far as we know, the young reality star is still very much involved with Tyga.

Keep up with Enstars for all the latest news on Kylie Jenner, Khloe Kardashian and the entire Kardashian family right here.