Whitney Houston and Bobby Brown's daughter was placed in a medically-induced coma after she was found face down and unresponsive in a bath tub at the Roswell house she shared with her boyfriend, Nick Gordon, on 31 January (15).

The 22 year old, who has suffered irreversible brain damage, was moved into a hospice last month (Jun15) after doctors told her family there was nothing more they could do for her, and now it appears her relatives are preparing for the worst as Whitney's sister-in-law and former manager, Pat Houston, starts cleaning out Bobbi Kristina's pad.

A source tells Us Weekly magazine, "She kept all the pictures and Whitney's platinum and gold album plaques. But she threw everything else out."

Pat Houston was appointed co-guardian of her niece's estate in May (15), alongside Bobbi Kristina's dad.

Meanwhile, Whitney's mother Cissy Houston has allegedly been unable to visit her ailing grandchild as she is battling her own health issues and has been advised against travelling to Georgia from her home in New Jersey.

The insider adds, "Pat calls Cissy and lets her speak to Bobbi over the phone. Cissy wants to be there badly."

The latest news emerges days after filmmaker and close family friend Tyler Perry urged the public to show "respect" to the Brown and Houston families as they face the prospect of another tragedy.

Whitney died in similar circumstances in the bathroom of a Beverly Hills hotel suite in 2012, with heart disease and cocaine use listed as contributing factors.