When Caitlyn Jenner told her kids that she would make the transition from male to female, they were supportive – but they couldn't help wondering how to address the family member they used to call "Dad."
It turns out that some things haven't entirely changed.
"[Caitlyn] spoke to each of the kids separately and told them to take their time in getting used to this," says a Jenner family friend. "She would prefer not to be called 'Bruce,' but told the kids that they could still call her 'Dad,' at least for now."
"Caitlyn has been really understanding that it doesn't come naturally for anyone," the source continues. "No one expects this change to happen overnight. If one of the boys slips up, it's not a big deal."
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In her recent interview with PEOPLE, Jenner's eldest daughter, Cassandra, referred to Caitlyn as 'Dad' – and voiced her complete support. "There's so much more to being a woman than our external appearance," she says. "I am really looking forward to exploring that more with her."
Even Jenner's mother says that adapting to the news has been a process. "It takes some time getting used to," Esther Jenner tells PEOPLE. "I've called [Caitlyn] Bruce since the day he was born. It's going to take some time, but I will adjust."
The Kardashians, too, have struggled with using the correct pronouns – but are determined to address Caitlyn properly.
"This is the new normal," a Kardashian family source tells PEOPLE. "They all still slip up and refer to Caitlyn as Bruce, or she as he, him, all that. It takes a lot of work to get it right."
And if anyone makes a mistake, the rest of the family steps in. "The whole family is correcting each other when they get it wrong," continues the source. "Not in a joking way, but just a reminder that, 'Hey, everything's changed, and we need to respect how she wants to be called.' "
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For much more on Caitlyn's new life, pick up this week's issue of PEOPLE, on newsstands Friday