The 82-year-old family matriarch was reported missing at the weekend, though Jermaine Jackson later insisted that she was "fine" and had gone to "de-stress" with her daughter Rebbie in Arizona.
At the time Paris went against her uncle and wrote on Twitter that she still considered her grandmother missing, leading to a police investigation into Katherine's whereabouts.
Although authorities have now established contact with Katherine, 14-year-old Paris has continued to share her suspicions about the saga.
"8 days and counting [without contact]," she wrote. "Something is really off , this isn't like her at all .. i wanna talk directly to my grandmother!!"
Her cousin Tito Jackson - named after his singer father - sympathised with Paris, tweeting to her: "I know it's completely unfair for them to do this to you and your brothers. We will keep trying. I love you."
Paris previously defended her grandmother on Twitter following reports that she had suffered a stroke.
The Jacksons were caught up in additional controversy recently when a number of family members contested the authenticity of Michael's will.