Things have been so strained in Caitlyn Jenner's still evolving relationships with her daughters that she wasn't even invited to Kylie's recent high school graduation.

That revelation came to light during a recent episode of Jenner's new "I Am Cait" reality show when mom Kris Jenner apologized to her for the oversight.

"One of the reasons I wanted to talk to you was because I don't want your feelings to be hurt like the other day," Us Weekly reports Kris told Caitlyn during their much bandied about first face to face chat before the cameras. "When I heard that you weren't happy about not being included in Kylie's graduation."

As she held back tears, Caitlyn let her feelings clearly be known on the matter.

"It wasn't me making that decision," she said. "It was you making that decision. I was so disappointed in everybody. For 15 years of my life, I carpooled the kids every day. Some days, I would spend three or four hours in the car. [It's] a slap in the face when you don't even get invited to their graduation."

The 59-year-old momager then shared some of her own innermost feelings, letting Caitlyn know that she felt much the same way stemming from some of the quotes she made in her July 2015 Vanity Fair cover story heralding her transformation. In the piece, Caitlyn alleged her ex controlled all the money and for years was aware she dressed in women's clothing and was using hormones.

"Because I spent 25 years of my life and 18 hours a day and blah blah, blah," Kris added.

The exes' sit-down talk was a continuation from last week's episode where Kris touched upon her feelings of abandonment stemming from the much heralded breakup.

The new episode airs on Sunday, at 8 p.m. ET on E!