Bobbi Kristina Brown likes to keep a little something to remember her mom Whitney Houston by.   The late pop star’s only child has been wearing a big ring, but despite earlier speculation, Brown isn’t actually planning to walk down the aisle with her “adopted brother/boyfriend” Nick Gordon, 22.

Her rep tells PEOPLE the pair are not engaged.   And a source adds, “She is just wearing her mom’s ring.”   Brown raised eyebrows when she was first spotted kissing and holding hands with Gordon, whom Houston took in to live with them many years ago.