The only child of the late singer - whose lifeless body was found submerged in a bath tub at her Beverly Hills hotel suite on February 11 - turned 19 on Sunday (04.03.12), and saw in the occasion with her close family.
A source said: ''Bobbi is now with the family and going through the grieving process just with them.''
The teenager - whose father is Whitney's ex-husband Bobby Brown - had to be hospitalised following the 'I Will Always Love You' singer's death, and went missing on the day of the funeral.
But an insider reveals that Bobbi has started to show signs of improvement since bonding with her maternal grandmother, gospel singer Cissy Houston.
The source told US Weekly: ''[They] have been getting along a bit better. She really needs her own space right now to heal, and Cissy knows that.
''Cissy has a team of people helping her through this ... right now, the goal is to make her feel special and loved.''
During an appearance on American chat show 'The Talk', she said of her brother: He has admitted that they had an affair.''