Sarah Gass' gender reveal prank.Photo:Sarah Gass |@_life_of_sarah/tiktok

Sarah Gass |@_life_of_sarah/tiktok
“Oh my gosh … It’s a boy. I’m not seeing any pink so I know it’s a boy!” she exclaimed in thevideo Gass shared on TikTok, which has reached 2.3 million views on the app. The Tennessee-based grandma wept with heartening confidence as she unraveled more black, white and gray apparel.
“My mom thinking she finally got her grandson,” Gass wrote alongside the video, adding, “Wait for it."
When Vickie opened the bag’s final item — a gray headband topped with a bow — her mood instantly flipped. She gawked at her pregnant daughter and begged, “It is a boy, right?"
Between laughs, Gass copped to the ruse and revealed that she wasn’t expecting a son after all, and Vickie’s disbelief dissolved into disappointment.
Sarah Gass and mom Vickie.Sarah Gass

Sarah Gass
The triple girl-mom posted the clip last month and garnered over 135,000 likes, but Gass tells PEOPLE she recorded it in 2019. The gray, red-herring onesies were meant for her youngest daughter, Thea, who is now 4 years old. Her first two daughters, Kirra and Emerie, are ages 12 and 10, respectively.
Sarah Gass' mom Vickie and daughters Kirra, Emerie and Thea.Sarah Gass

Even though she took a while to share the video online, Gass says she thought people would get a kick out of Vickie’s earnest reaction to the prank.
“I honestly didn’t expect that much emotion to come out of her because she’s not somebody that gets overly excited or overly upset,” Gass tells PEOPLE. “I really do want to start posting more videos [of her] … because she’s fun to pull pranks on.”
The professional hair stylist adds that her mom wasn’t alone in hoping for a male addition to their family.
“We just don’t have any boys on my side of the family,” Gass says. Vickie and her late husband adopted Gass when she was 11 years old, but she only has sisters in her birth family, too. When Vickie’s only son died, she adopted his daughter as well.
Sarah Gass' daughter and mom Vickie.Sarah Gass

“I wanted everything to stay more neutral, I didn’t want the bright pink,” she recalls. Her third-born had other plans: “Now [Thea] literally refuses to wear anything but pink and long dresses,” Gass tells PEOPLE.
source: people.com