Amor Vittone (Photo: Gallo)
Joost died on Monday at his home surrounded by family following a long battle with motor neurone disease.
In her post, Amor calls Joost her first love.
“It’s with a sad and heavy heart that we said farewell to Joost an hour ago. We’ve been embraced with friends and lots of love. Joost, rest in peace and know that Jordan and Kylie will always have you in their hearts. You are now with the angels and not in any pain.
"You are and always will be my first love. We love you,” Amor wrote on her official Facebook page on Monday afternoon at 15:30.