Bobbi Kristina Brown's boyfriend has been accused of assault and theft, on the same day her family announced she was being moved into hospice care.
Brown, the only child of Whitney Houston, was discovered face down in a bath at her Atlanta home in January. She has never regained consciousness.
Her boyfriend Nick Gordon has now been accused of causing her "substantial bodily harm" in a $10m civil case.
The legal action was filed by Brown's court-appointed conservator.
Bedelia Hargrove told People magazine in a statement:. "I filed this lawsuit to pursue justice on behalf of Bobbi Kristina Brown. No human being, male or female, should endure what Bobbi Kristina endured."
The legal case accuses Gordon of assault, battery, infliction of emotional distress and maintaining "the fraud that he had married Brown" after she inherited a substantial amount of money.
It claims that Bobbi Kristina confided to an unnamed person that Gordon "was not the man she thought he was" and made plans to meet them on 31 January to talk about it.
Court papers claim she never made it to the meeting and "became embroiled in a loud argument" with Gordon, which ended with her "face down in a bathtub, with her mouth swollen and another tooth knocked out".
"Even after Brown's hospitalization, and while she was in a coma, (Gordon) accessed Brown's bank account and stole in excess of $11,000 (£7,000)," the documents say.
