Khloe Kardashian

Khloe Kardashian 'upset' to hear about Caitlyn's transition

But the reality star says there is no "handbook" on how someone should tell their family.

Caitlyn, who used to be known as Bruce Jenner, announced her gender change in a television interview back in April 2015.

Khloe says she now understands it wasn't an easy thing for her stepmother to do that.

"It's not that I'm angry that Bruce was transitioning to Caitlyn," she told ES Magazine.

Kim Kardashian gives birth to baby boy

"The last few days were very stressful," a source tells E! News exclusively. "It was time."

Fortunately, mother and son are both doing well, and although the days leading up to Kim's delivery were stressful, she had plenty of family members on hand for moral support.

In addition to Kanye, of course, Kris Jenner, Kourtney Kardashian and Khloe Kardashian all joined Kim at the hospital.

Khloé Kardashian confronts Caitlyn Jenner about Kris

In a preview for Sunday's I Am Cait, which marks the first time we've seen the 31-year-old star and parent Caitlyn Jenner on camera together, the Keeping Up With the Kardashians stunner confronts her parent over comments she made about ex Kris Jenner, whom she was previously married to, prior to her transition, for 22 years.

"We haven't really gotten a chance to talk since you sent me all those tough texts," Caitlyn says while wearing a pretty blue sweater, her eyes filled with emotion.