Chyna previously feuded with Kardashian's famous family

Updated April 22, 2016 07:10 PM
Kylie Jenner/SnapChat

brightcove.createExperiences(); Kylie Jenner and Blac Chyna have one person to thank for a headline-making selfie in which they declared themselves “best friends” – Kim Kardashian West.

A source tells PEOPLE that Kylie’s sister “definitely got involved and arranged for Kylie and Blac Chyna to get together.”

The source likens Kardashian West’s peacemaking to when in February she arranged to meet with Blac Chyna’s friend Amber Rose after Rose was involved in a Twitter controversy with Kardashian West’s husband Kanye West.

“Just like Kim got together with Amber Rose earlier this year to stop drama, she wants Kylie and Chyna to stop the nonsense,” the source says.

Blac Chyna, 27, is engaged to Jenner and Kardashian West’s brother Rob Kardashian. On Thursday, Jenner, 18, shared a friendly photo on Snapchat with her brother’s new fiancée, claiming they’d been “best friends the whole time,” despite their complicated history. (Blac Chyna was once engaged to and shares a son with Kylie’s current boyfriend, Tyga.)

“The idea that Kylie and Chyna have been BFF’s all along is obviously silly and and not true,” says the source. “It started off more like the saying that you should keep your friends close and enemies closer. Kylie, however, seemed relieved about getting together. She is growing up too and doesn’t like all the drama.”

The source says that Kardashian-Jenner family is getting used to the notion of Rob marrying Blac Chyna.

“Everyone knows that Rob will go ahead with the wedding, so his family is now making an effort with Blac Chyna. Kris [Jenner] wants to get to know her as well, since Rob seems happy.”

For his part, Rob shared his approval of his sister and Blac Chyna getting together.

“So happy my girls finally got to talk and make peace!” he captioned a mirror selfie of Chyna.