In 2015, when Caitlyn Jenner first announced she was transitioning, Cassandra Marino admitted to 20/20 that her father was not always there for her as a child.

"We have a very complex relationship," Marino told host Diane Sawyer. "[She's] disappeared out of our lives, especially out of my life. So ... I'm looking forward to this next chapter."

Jenner also admitted she may have not been the best parent to her four older children, saying, "The big formative years for them, I was really struggling with these issues. I talked to all the boys about this after the fact, that, yeah, I didn't do a good job. And I apologized to my kids for that."

However, a lot of that began to change after her transition as Jenner began bonding more with her four adult children, including the oldest child, Cassandra.