Cincinnati Bengals defensive tackle Devon Still, whose relationship with his cancer-stricken daughter has been the NFL feel-good story of the season, has not paid child support for four months, according to the sick girl’s mother.

Channing Smythe, the mother of 4-year-old Leah Still, said she has been pushed to the brink of homelessness because Still refuses to provide child support.

“I don’t consider him a deadbeat dad,” Smythe told the Daily News on Wednesday. “I know he loves and cares for his daughter and he is there for her. I just need him to help me financially.”

Civil rights attorney Gloria Allred, who represents Leah’s mother, delivered a letter to the NFL on Tuesday asking the league to investigate if Still has violated its Personal Conduct Policy by failing to pay child support for the girl, who was diagnosed with neuroblastoma, a rare pediatric cancer in June.

“I don’t think it is fair that Devon Still, who is Leah’s father, has refused to pay any child support for her for the months of August, September, October and November of this year,” Smythe said in a declaration that accompanied the letter addressed to NFL vice president Jeffrey Pash.

Smythe said in her declaration that she is unable to work because Leah’s treatment and care require full-time attention, adding they would be homeless if a friend of her mother’s had not permitted them to move in with her. Smythe claimed she had to accept food stamps from July through October in order to feed herself and her daughter.

Smythe and Leah live in Delaware, and Smythe said she has to borrow cars from friends and relatives to take the girl to Children’s Hospital in Philadelphia for treatment.