Whitney Houston‘s daughter was sporting an interesting piece of jewelry on her ring finger during her PDA-filled stroll with her “adopted” brother this week … a big, fat ring.

As we previously reported, Bobbi Kristina and Nick Gordon finally went public with their relationship this week … holding hands and kissing during a lunch date in Atlanta.

Now, with rumors swirling about a possible engagement … the massive ring on Bobbi’s finger isn’t doing anything to hint otherwise.


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