The internet has a funny way of making you feel like you know someone's entire family tree just because you follow their morning routine. If you've spent any time on TikTok or YouTube lately, you’ve likely run into Cayla Vander Baan. She's the lifestyle creator who basically perfected the "cool mom" aesthetic while documenting her transition from newlywed life with Steven (SlickStevie) to becoming a first-time parent.
But here’s the thing. While we see her husband, her baby girl, and even her dog "Goose" constantly, there is a weird amount of confusion regarding the Cayla Vander Baan sister situation.
People are constantly digging for info. Is she a twin? Does she have a secret sister who is also an influencer? Honestly, the search for Cayla’s siblings often leads fans down a rabbit hole of dead ends and "who is that?" moments.
The Mystery of the Cayla Vander Baan Sister
Let’s clear the air. Cayla—formerly Cayla Koshar—is actually pretty private about her extended family compared to her daily life with Steven. When people search for her sister, they’re often seeing her post with "besties" or cousins and assuming there’s a biological link.
She often posts "GRWM" (Get Ready With Me) videos or Nashville travel vlogs featuring other girls who look remarkably like her. In the world of blonde lifestyle influencers, everyone starts to look like they share a DNA strand. But most of those "sister" appearances are actually close friends or fellow creators within the Nashville and Michigan circles.
Actually, the confusion often stems from her high-energy vlogs. She uses terms like "girlies" or "my person" constantly. If you aren't paying close attention to the captions, it’s easy to think she’s introducing a sibling when she’s really just hanging out with her inner circle.
Family Ties and the Koshar Roots
Cayla grew up in Kalamazoo, Michigan. That Midwest upbringing is a huge part of her brand. Her maiden name, Koshar, is where you’ll find the real family trail. While she’s lived her life loudly on the internet since joining YouTube in 2014, she’s been careful to keep the spotlight mostly on herself and, eventually, her marriage to Steven.
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You’ve probably seen the wedding footage. It was massive. May 2023 was basically the "Vander Baan World Tour" on social media. During the wedding content, fans were scouring the bridesmaid lineup to spot a sister. While there were family members present, Cayla’s brand is very much built on the "duo" dynamic—first with Steven, and now with her daughter.
- Maiden Name: Koshar
- Location: Originally Kalamazoo, MI; frequent stays in Nashville
- Spouse: Steven Vander Baan (SlickStevie)
- Inner Circle: Heavily features cousins and long-term Michigan friends
Why Does Everyone Think She Has a Twin?
It’s the "Influencer Face" phenomenon.
Cayla has a very specific, polished look that is incredibly popular right now. When she collabs with other influencers in the lifestyle space, the physical similarities are wild. There have been several TikToks where she’s seen dancing or doing a haul with a friend, and the comments section immediately explodes with: "Wait, is that your sister?"
No. It’s just another blonde girl with a great skincare routine and a Stanley cup.
Kinda funny, right? We’re so used to "sister acts" like the D'Amelios or the Kardashians that we assume every successful creator must have a sibling waiting in the wings to launch a joint podcast. In Cayla’s case, she’s the primary star of her own show.
From Michigan to "Mom-Tok"
The focus on her family shifted heavily in 2024 and 2025. Once she announced her pregnancy, the "Cayla Vander Baan sister" searches were replaced by "Cayla Vander Baan baby name."
She leaned hard into the pregnancy journey—hospital bag checklists, nursery reveals, and the "pregnancy brain" moments that made her even more relatable. By the time her daughter arrived in September, her content had transitioned from "lifestyle influencer" to "authoritative young mom."
This shift actually distanced her even more from her siblings or extended family in her content. When you have a newborn, your world shrinks to about three people. The "sister" questions faded because the "baby" content was just so much more engaging for her 130k+ subscribers.
What You Should Know If You’re Following the Drama
There isn't any. That’s the "secret."
In a world where influencers thrive on family feuds or "revealing the truth about my sister," Cayla stays remarkably lane-focused. She isn't a "tea" creator. She isn't out here exposing family secrets for clicks.
If you are looking for a hidden sibling to follow, you might be disappointed. Most of the people she tags as "family" are cousins who she’s been close with since childhood in Michigan. They show up in the Nashville vlogs, they go to Target together, and they look enough like her to be siblings, but they aren't the "secret sister" the internet seems to be hunting for.
Final Take on the Vander Baan Family Dynamic
Cayla Vander Baan has managed to do something pretty rare: she’s stayed relevant for over a decade without leaning on family scandals. Whether she’s posting about her "clean girl" makeup routine or the reality of being a first-time parent, she keeps the focus on her immediate household.
If you’re trying to keep up with her, stop looking for a sister and start looking at her community. She treats her followers—and her close friends—like family, which is probably why people are so confused about her actual siblings in the first place.
Practical Next Steps for Fans:
- Check the Tags: Before assuming someone in a vlog is her sister, check the Instagram tags. It's almost always a Nashville-based creator or a cousin from Michigan.
- Watch the Wedding Vlog: If you really want to see the extended family, her 2023 wedding video is the most "all-access" pass you’ll get to the Koshar and Vander Baan families.
- Follow the New Era: Her current content is 90% motherhood. If you’re looking for family updates, her "First Time Parent" series on YouTube is where the real stories are happening now.