Just hours after an Instagram hack prompted their very public split, Rob Kardashian and Blac Chyna continued to fight over baby Dream online.

Rob, 29, shared a sweet photo of his one-month-old daughter on social media, showing fans how much he missed her after she was taken from their home by Chyna, 28.

MORE: Blac Chyna Admits to Hitting Rob Kardashian in Instagram Hack — "I Don't Want to Treat Him Like Tyga"

"I really miss this girl, never felt so in love with someone the way I do with you Dream," he captioned a photo of the newborn with her thumb up. "Never thought a woman would try to take my happiness when all I wanted was to make her happy."

dream kardashian instagram
Instagram

His caption did not sit well with his ex, who promptly responded in the comments section.

"Rob stop it man! I sent u this pic!!!!!,"Chyna wrote, starting a war of words with the father of one.

MORE: North West Goes Horseback Riding Following Kanye West's Hospitalization!

"@blacchyna and u texting me on my comment section on here proving my point even more," he replied. "U blocked me and it's f***** up and I'm heart broken. I loved every inch of you."

Rob has since deleted the photo from his Instagram.

For a look back at Chyna's hacked messages, click through the gallery below!