In honor of Mother's Day yesterday, Rob posted throwback videos and pictures of Chyna, along with a heartfelt message for his ex.
"And happy mama's day to the mother of my only child @blacchyna," Rob wrote. "I am so Thankful for our beautiful baby girl and so Thankful for YOU and never thought I could be this Happy so thank you for giving me Her."
Take a look at Rob's post below.
[Photo: Getty Images]