The secret Kaey knew

Everyone has something or someone they feel completely close to. In Marni's case that would be her two best friends Kaey and Kayla. As long as they've known each other they've told one another everything: who they like, what they've done and regret, family secrets, rumors, insecurities, everything. So what happens when their friendship is tested because of there's a lack of necessary communication?
We all have secrets. They just don't always affect our strongest bonds.