(CNN)There were balloons, confetti and a big teddy bear -- all the usual trappings of an extravagant gender reveal photo shoot.
But this Kentucky mom's celebration had a twist: it was a gender reveal for her 20-year-old transgender son.
"He thought I was insane," Heather Green told CNN.
"How do you tell people your daughter is now your son? But not only now your son, but has always been your son."
Last September, the son, Adrian Brown, told Green he'd be transitioning.
Green says she didn't just want to support the journey; she wanted to celebrate it.
And that's what she did last month, when Brown turned 20.
Staying true to the cute and quirky nature of the gender reveal trend, Green posed in a fake belly bump with blue balloons.
Brown lay next to a teddy bear swaddled in a blanket.