Wiz Khalifa is reportedly on the verge of filing legal papers seeking greater custody of his one-year-old son with estranged wife Amber Rose.

According to TMZ, Wiz considers Rose a bad mother and feels he has a whole host of examples to prove it. The hip hop star reportedly claims his model ex often stays out all night, resulting in relatives and staff members having to care for the child in her abscense.

Wiz further alleges "the family dog eats its own feces and then licks Sebastian's face," his young son.

Among other accusations hurled against Rose, according to TMZ, are that "when she wakes up she'll play with the kid for 15 minutes or so then disappear" and she and her mother have a volatile relationship that often results in "vulgar exchanges" with the N-word used, proving upsetting to the boy.

Soon after the couple publicly split and Rose formally filed for divorce in late September, she instantly went on the offensive by labeling her husband "a serial cheater."

TMZ reports at one point Rose claims to have wanted to join her husband on his summer tour, but was rebuffed by him with excuses including she should stay home with their son. The website adds Rose insists her husband once told her "he's the bread winner and he needed to be left alone to make money."

Since then, Wiz has also hinted he suspects his wife of cheating with her manager Nick Cannon, a charge she has strongly denied. Sources adds he considers his estranged wife to be one "big nag."

During NBA All-Star weekend in New York last week, Rose told reporters she planned to spend as much of the Valentine's Day weekend as she could with rumored new beau and NBA star James Harden.

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