Paris Jackson is reportedly concerned for the welfare of her younger brother, 15-year-old Blanket, who sources say is essentially living by himself.
While 19-year-old Paris and her 20-year-old brother Prince have enjoyed greater public profiles since becoming adults - Paris appeared on a recent Rolling Stone cover - their younger sibling is still meant to be in the care of the guardians assigned to the children after pop superstar Michael Jackson's death.
TMZ reports that Paris has complained her younger brother is for the most part living entirely by himself in 86-year-old grandmother Katherine Jackson's home, high in the hills above Los Angeles.
Despite the Jacksons being a large family - Katherine and husband Joe have eight children between them, giving Michael's children a large circle of aunts and uncles - Paris fears her young brother has slipped through the cracks, TMZ reports.
While Blanket lives in Katherine's home, his grandmother has not been there herself since January - since then she's spent a two-month stint in London before staying at daughter Rebbie's LA home.
Katherine and Joe Jackson share guardianship for Blanket with their 38-year-old grandson TJ, one-third of 90s boy band 3T. While TJ and his wife pay regular visits to Blanket, it's understood neither actually lives at the home.
Paris, a burgeoning actress and model, now lives in a converted studio in the former Jackson family compound, around 20 minutes' drive from her younger brother.
In her January tell-all Rolling Stone interview, the striking blonde spoke of teen years marred by suicide attempts, a sexual assault and bouts of low self-esteem following her father's 2009 death.
"It was just self-hatred," she explained of her suicide attempts.
"Low self-esteem, thinking that I couldn't do anything right, not thinking I was worthy of living anymore."
It's in sharp contrast to what Paris said were idyllic days being raised by her father on the Neverland ranch, where the three children were homeschooled and shielded from the public eye.
"When you're at home, your dad, who you love more than anything, will occasionally come in, in the middle of class, and it's like, 'Cool, no more class for the day. We're gonna go hang out with Dad,'" she told Rolling Stone.
"We were like, 'We don't need friends. We've got you and Disney Channel!'"