Burt Jenner is opening up about Caitlyn Jenner's transition -- and sending out a warning to anyone who wants to hate on his "dad."
The reality TV star's oldest son took to Instagram yesterday to share a new photo of Cait, seen with who we believe are Casey Jenner's daughters Francesca and Isabella. The trio look happier than ever as they play with a motorized race car.
"So obviously a lot has changed... But thankfully, for me, the most important stuff didn't," Burt, 37, captioned the photo.
"My dad still loves toys, fun toys, still likes to go fast, still loves adrenaline and will still whip your ass at... ANYTHING," he continued. "Yup all you haters, my dad will still probably whip your ass at 65 with implants."
"Oh 'No'? There were a lot of world class athletes that said the same thing... And lost," he added. "Sure, I believe you, since you have comparatively accomplished so much with your life."
Casey previously opened up about how she's seen a change in her parent since becoming Caitlyn.
"She's happier and more appreciative of her family. She is trying harder and there is a softness to Caitlyn that is new to me," she told PEOPLE. "I think part of that is that when someone is happier, they are just nicer."
Both Burt and Casey reportedly first found out about Caitlyn's transition from their mother Chrystie Scott back when they were just 13 and 11 years old.
