Two nights ago, the 19 year old flaunted her love for her brother-turned-boo, posting a photo of them smooching with a hard to ignore rock on the ring finger of her left hand.
With a photo, Whitney Houston's only biological child tweeted:
And along with another photo, Bobbi showed the world her and Nick's love are unbreakable, tweeting:
The two reportedly grew up together, after Whitney took Nick in at the age of 12 when his father went to jail and his mother was not able to take care of him.
The now turned lovebirds got inked up in dedication to the late singing legend they both called mom and have been rumored to be sharing a $1.2 million home in Atlanta.
If they are indeed shacking up, an engagement and soon to be ringing wedding bells doesn't sound too far fetched for the couple.
Check out Bobbi's rock in the accompanying gallery!