The reality star also discusses sex reassignment surgery
Bruce Jenner in DVF dress

Bruce Jenner calls his female identity “Her,” but his daughters may have just given him a new term of endearment.

“I’m always going to be your dad, no matter what I go through,” the Olympian promised his children in part two of Keeping Up with the Kardashians: About Bruce on Monday night.

“We should call you ‘Mad,’ ” one of the girls suggested as the family laughed.

“Mom and dad,” step-daughter Kourtney Kardashian, 36, chimed in. “And you’re a little bit crazy.”

In a more serious moment, Bruce, 65, discussed how he’s changing his appearance beyond altering his face, telling Kim Kardashian West, 34, that although he planned to fully live as a woman as early as the spring, he had not yet made an appointment for sex reassignment surgery. (The episode was filmed in February.)

“Oh, the little thing down there?” he said, smiling. “That’s kind of the last thing you can do. You can do an awful lot before that.”

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