Wiz Khalifa and Amber Rose at the Billboard Music Awards in Las Vegas May 18, 2014
ROBYN BECK/AFP/Getty Images

Wiz Khalifa and Amber Rose’s custody dispute is about to get ugly. On the heels of Rose’s epic war of the tweets with Kanye West’s sister-in-law, Khalifa, in an effort to gain custody of their son, Sebastian, is now claiming that Rose is an unfit mom.

According to TMZ, Khalifa hasn’t yet filed any legal documents, but he’s compiling information against Rose. On top of allegations of Rose staying out at night, sources say that Khalifa’s list of gripes includes issues with Rose leaving Sebastian in the care of family and staff. He also says that Rose and her mother have a voilatile relationship and often engage in screaming matches that include the use of the n-word.

Khalifa and Rose were married July 8, 2013, but Rose filed for divorce in September 2014, citing irreconcilable differences.