Kim Kardashian West doesn't want to say "I told you so," but she's glad her sisters can finally relate to her challenges as a working mom

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Kim Kardashian West is thrilled that two of her younger sisters have joined the “Mom Club!”

At the City of Hope “If Only” Texas hold ’em charity poker tournament Sunday night at The Forum in Los Angeles, the reality star revealed how family dynamics have shifted since Kylie Jenner gave birth to daughter Stormi on Feb. 1 and Khloé Kardashian welcomed daughter True on April 12. (Khloé, Kris Jenner and Kendall Jenner also attended the event, which was hosted by Shelli and Irving Azoff.)

To start, Kim shared with PEOPLE that her two older children — Saint, 2½, and North, 5 — are embracing their new cousins. It even seems like the babies remind Saint of his own 6-month-old sister, Chicago.

“They love their cousins! Saint, every time he sees Stormi and True, he’s like, ‘I have a baby! Do you want to see my baby?!’ He is so obsessed with having a little sister. It is really, really cute,” Kim said. “They are all so good together, but I think Saint is probably the most excited about all of the babies.”

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First Annual "If Only" Texas Hold'em Charity Poker Tournament
The Kardashians and Jenners at the City of Hope poker tournament
| Credit: Rich Fury/Getty
First Annual "If Only" Texas Hold'em Charity Poker Tournament
Kris Jenner and Kim Kardashian West
| Credit: Rich Fury/Getty
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The West family
| Credit: Kim Kardashian West/Twitter

Kim, 37, added that watching her sisters learning the ropes of motherhood has also been fulfilling.

“I don’t know what the word is — not really an ‘I told you so,’ but … ‘Okay, you get it now. Welcome to the ‘Mom Club,’ ” she said of Kylie, 20, and Khloé, 34.

“They finally understand what it is like when I am really tired at work, when I’ve been up and feeding all night long, or things like that, those things they really didn’t get,” Kim explained. “It’s fun to see them really understand it now.”

Kylie Jenner StormiCredit: Kylie Jenner/Snapchat
Kylie Jenner and her daughter Stormi
| Credit: Kylie Jenner/Snapchat
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Khloé Kardashian holding her daughter True
| Credit: Khloe Kardashian/Instagram

RELATED VIDEO: Kylie Jenner Says There’s “Nothing Better” than Holding Her Daughter Stormi: “My Little Love”

Kendall, who’s the only one of the KarJenner sisters without any kids, has also been enjoying her rapidly growing family. “I love all of my nieces and nephews — I like that I can give them back,” she said, laughing.

“But I do feel … a really special connection to Stormi,” admitted the 22-year-old model. “I don’t know if it’s that Kylie is my little sister, but I was hanging out with her the other day at lunch, and we were just sitting, and she was just so comfortable with me, and it made me so happy.”