... And that's putting it mildly.
WATCH: Kris Jenner Says She's 'Done' With Caitlyn After Reading Her Memoir: 'Everything She Says Is All Made Up'
Let's take a look at how Kris and Caitlyn's once loving relationship has become strained.
October 2013: Kris and Caitlyn Separate
Kris and Caitlyn announced their separation in October 2013.
"We are living separately and we are much happier this way, but we will always have much love and respect for each other," they said in a joint statement to E! News. "Even though we are separated, we will always remain best friends and, as always, our family will remain our number one priority."
After their separation, the couple definitely remained on good terms. Kris even Instagrammed a photo in honor of their 23rd wedding anniversary in April 2014 with the caption: "Happy Anniversary to one of the most amazing men I know!!!! I love you, Wow 23 years!!!!! #love #weareofficiallyvintage.Read more at Entertainment Tonight