Seems things are about to get messy between Chris Brown and Baby Mama's BF...he's got Royalty now

 

Stuff like this makes my job alot more fun...Chris Brown's daughter Royalty is presently in Taxas with Nia's boyfriend and he is posting photos of him and Royalty getting along real good! You all know Chris aint gonna take no joke when it has to do with his DAUGHTER

Chris Brown's got a war on his hands -- his baby mama's boyfriend just staked his claim to baby Royalty with two new tattoos.

Nia Guzman's BF, King Ba keeps posting adorable pics of himself with Royalty ... and in the latest one he's flaunting fresh ink of a giant royal crown over the name, "Nia."

The tatts are definitely brand new -- because when he was photographed at Easter ... again with Royalty ... the left forearm was clean.