May 18, 2015 11:40 PM

As Bruce Jenner discussed his transition with his family – with the cameras rolling – the Kardashian and Jenner children cried, laughed and expressed their hope that their dad may finally find true happiness.

Keeping Up with the Kardashians: About Bruce aired in two parts Sunday and Monday, and viewers learned secrets that the Olympian-turned-reality star didn’t even tell Diane Sawyer in April’s groundbreaking interview.

He planned to fully transition this spring, but wasn’t quite ready for sex reassignment surgery. He was mostly concerned for his two youngest daughters. He hated having to cut his hair. And despite their divorce, he still loves Kris Jenner.

Here are four more revelations from the emotional special:

His Daughters Haven’t Met ‘Her’

As of the special’s taping in January, neither the Kardashian nor Jenner sisters had met Bruce’s female self. (It seems Kim Kardashian West has seen “her” recently, telling Access Hollywood “she looked beautiful.”) They all would like to – in their own time.

“My biggest fear about meeting her for the first time is just I think my reaction. I’m very facially expressive,” Khloé Kardashian, 30, said. “I don’t want to do anything offensive that would hurt her feelings.”

But Bruce, 65, is eager to share his real identity with his family.

“They’re all kind of nervous to meet her,” he explained. “She’s always more fun, more at ease and feeling good about herself. It’s all part of me. It’s like having Bruce with a little icing on the cake. It only gets better.”

Kylie and Kendall Thought Bruce Was Having an Affair

In the first part of the special, Kendall Jenner, 19, recalled finding her father’s makeup around their home with younger sister Kylie Jenner, 17.

The girls mistakenly thought the feminine products belonged to a mistress of Bruce’s – and decided to keep quiet.

“We didn’t want our family to be broken up, so we didn’t tell anybody,” Kendall said.

Bruce Was Almost Outed Decades Ago

After her solo sit-down with Bruce, Kardashian West, 34, told her sisters Bruce’s struggle could have become public about 30 years earlier.

The publicist negotiating Bruce’s interview with Diane Sawyer, she explained, first helped him back in the 1980s, when a reporter caught Bruce in the act. But Bruce “begged” the journalist not to move forward with the story, and he agreed, she said.

Kourtney Is Waiting to Tell Mason

North West, who turns 2 next month, and 2½-year-old Penelope and 5-month-old Reign Disick are too young to understand what’s happening with their grandfather, but Kourtney Kardashian said she knows her son Mason, 5, is more aware of the situation than his parents realize.

“I think we are waiting to see what Bruce does before we tell Mason,” the 36-year-old said in part 2 of About Bruce on Monday night.

But she and partner Scott Disick agree explaining the meaning of “transgender” to Mason will teach him an important lesson about never judging people – and that they want him to hear about Bruce from them, not kids at school.

“It’s only a positive thing for my son and my daughter to know all these different things that go on in the world,” said Disick, 31. “You only really get one chance at this life, so whatever you gotta do to be happy, [you do].”

RELATED VIDEO: Kim Kardashian’s Message to Bruce Jenner: ‘Do Not Steal My Glam Team’

Keeping Up with the Kardashians airs Sundays at 9 p.m. ET on E!

Editor’s note: Per Bruce Jenner’s request, PEOPLE will continue to use male pronouns until otherwise instructed.

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