Things just got nastier between Amber Rose and Wiz Khalifa.

In a document obtained by TMZ, the rapper slams his soon-to-be ex-wife for being a bad parent.

Wiz claims that Amber often neglects their 1-year-old son, Sebastian, by staying out all night and having her relatives babysit. Additionally, the MC claims the 31-year-old has heated exchanges with her mother and often times the N-word is used in the baby's presence.

Apparently, Amber only plays with Sebastian for about 15 minutes a day, then she'll tend to her own affairs and leave the child behind. Wiz reveals that Rose's dog eats its own feces and then licks the his son's face, which couldn't be nastier if it's true.

The contents of these documents come at a time when Wiz is seeking more custody of his child. Full custody is also being considered, but first he's trying to gather relatives and other witnesses to build his case.

After his marriage to Amber in 2013, Wiz was accused of cheating, which caused her to file for divorce last year.

Last week, the blond beauty stopped by Hot 97's Ebro in the Morning to discuss life after Wiz. She reveals it took her months to get over him even though he seemed to be having the time of his life. "Since I filed for divorce, my husband has been out with 50 different women," she said. "Pulling sweaty white bitches out the club. All these other girls, I ain't even gonna talk s---. All these girls do whatever. Not only was I in the house crying everyday, mourning my husband. You know, I had to see that on top of it."

See Amber Rose tell her side of the story below.

Watch Amber Rose's Hot 97 Morning Show Interview

See 10 Hip-Hop Couples That Didn't Last