Chris Brown and Nia Guzman

Although they seemed to get off to a good start, Chris Brown and his baby’s mother is at war.

According to TMZ, Nia Guzman, the mother of Chris Brown’s daughter Royalty, claims the singer stopped paying $2,500 a month in child support… and now, she wants much more.

The report says Brown was paying the payments up until March, when source says she demanded $15,000 a month, which he thinks is ridiculous.

Brown feels like Guzman is treating Royalty as a winning lottery ticket, while she feels like he’s incredibly cheap and their daughter is suffering because of it.

Nia’s lawyer plans to file legal docs in the next two weeks, demanding back child support and a monthly hike.

Stay tuned…