Blake Griffin's romance with Kendall Jenner appears to be heating up but at the same time, he and his ex-fiancee, Brynn Cameron, have reportedly taken a turn for the worse as they attempt to co-parent their two kids.

According to a new report, Griffin and Cameron, who reportedly split in July — just weeks before he stepped out with Jenner, are in the midst of a nasty custody battle over their two children, 4-year-old son Ford and 1-year-old daughter Finley. 

In court papers obtained by Radar Online from the Los Angeles Superior Court, Griffin reportedly filed documents to establish his paternity for child support and child custody back in October 2017. Also in the documents, the Los Angeles Clippers player reportedly requested joint legal and physical custody of the kids.

While Griffin's custody request for the children wasn't out of the ordinary, the outlet also revealed that Cameron had been hit with a "standard restraining order."

“Starting immediately, you and every other party are restrained from removing from the state, or applying for a passport for, the minor child or children for whom this action seeks to establish a parent-child relationship or custody order without the prior written consent of every other party or an order of the court,” the order read.

In Cameron's custody response, which was filed the following month, she reportedly agreed to Griffin's custody terms but also requested that the professional athlete pays for her attorney fees.

As for the ex-couple's child support arrangement, the court “may make orders for support of the children and issue an earnings assignment without further notice to either party.”

The Blast reported news of Griffin's custody battle with Cameron last week.

In September, just weeks after Griffin and Jenner were first spotted together, Us Weekly magazine claimed Griffin and Cameron had remained friends after their split. The outlet also revealed that Cameron shares an older son, Cole, with former NFL star Matt Leinart.

Since Jenner and Griffin first stepped out together, the couple has been seen regularly with one another in Los Angeles and New York City. That said, Griffin hasn't yet been seen on Jenner's family's reality show, Keeping Up With the Kardashians, and isn't expected to appear on the series in the near future. 

Keeping Up With the Kardashians season 14 is currently airing on Sunday nights at 9 p.m. on the E! Network.