'Devastated!' Cissy Houston Arrives At Bobbi Kristina Brown's Bedside Vigil In Atlanta

As Bobbi Kristina fights for her life surrounded by her loved ones, RadarOnline.com has exclusively learned that the intimate circle includes her maternal grandmother Cissy Houston, who is "devastated" at her dire situation.

The 81-year-old mother of the late Whitney Houston flew from her New Jersey home to join family at Atlanta's Emory University Hospital. Her granddaughter remains there in a medically induced coma after she was found face down and unresponsive in a bathtub last Saturday.

"Cissy is devastated to see Krissy in this condition," a family source told RadarOnline.com. "She is absolutely heartbroken to see her little grandbaby like this."

After dealing with her own daughter's tragic death just three years ago, Cissy is not handling Bobbi Kristina's situation well.

"Cissy was so traumatized losing Whitney and the pain is still raw from that," the source told RadarOnline.com. "Watching Krissy in the hospital and in the coma is almost more than she can handle. This is almost too much sadness for her to bear."

As RadarOnline.com previously reported, Bobbi Kristina's father, Bobby Brown, is constantly by his daughter's side as well, holding vigil as he holds out hope for her life.

For the latest developments, stay tuned to RadarOnline.com.