Chris Brown Baby Mama Drama, Father's Day Diss: Nia Guzman-Amey Praises Royalty's New 'Family,' Boyfriend King Ba Instagram Love Amid Karrueche Tran Heartbreak

Hip-hop superstar Chris Brown shares a child with former fling, Nia Guzman. Breezy fully supports adorable baby daughter Royalty, but apparently Guzman's new boyfriend King Ba deserves more Father's Day recognition...

On Sunday (June 21), the Instagram groupie shared this loving message on the popular social networking site (via HollywoodLife.com):

"What's understood doesn't have to be explained... You've been down since day one... When I lack the patience for the kids... You come right in and soothe and simmer me down! You've always put family first and the kids before yourself... I love you for life!"

Guzman's post was later deleted.

Obviously, Ba treats one-year-old Royalty as his own, which doesn't exactly thrill the 26-year-old "Loyal" crooner. An alleged HollywoodLife insider reveals that Brown feels "betrayed" by Guzman for supporting this new "replacement dad" - 

"Chris isn't mad at [King Ba], he's mad at Nia. He thinks Nia's betraying him for allowing this man to pretend he's his baby's father and then have the nerve to gallivant his daughter on social media, and in the same breath blast Chris, her biological father."

The source concludes:

"Chris thinks Nia's got him all the way twisted and he's demanding she put a stop to this foolishness at once... Chris is Royalty's father! She has his blood and that's all that matters."

Back in April, Ba even implied that Breezy was merely a "sperm donor." Do MstarsNews readers agree that's a rather low-blow?

Meanwhile, Brown managed to ignore Guzman's shade and enjoyed his special weekend alongside Royalty:

chrisbrownofficial: "Happy Father's Day to the real fathers. She changed my life. #GLAD2BEHERDAD."

chrisbrownofficial: "She didn't know how to blow the candles out. Happy Father's Day!"

How cute!

But ex-girlfriend Karrueche Tran did not join such festivities.