Bobbi Kristina Brown is romantically involved with Nick Gordon, Whitney Houston’ secret son

Bobbi Kristina Brown is romantically involved with Nick Gordon, the 22-year-old man who Whitney Houston raised like he was her own son, HollywoodLife.com reported.

Earlier reports claimed that Bobbi Kristina Brown doesn’t want to leave her home in Atlanta, Georgia to live with her grandmother Cissy Houston in New Jersey.

Two eyewitnesses told HollywoodLife.com that they witnessed the 19-year-old girl lip kissing her unofficial adopted brother, Nick Gordon, who lives with her in Whitney Houston‘s former townhouse in Atlanta.

The sources also said that Bobbi Kristina and Nick Gordon weren’t holding back their PDA during a shopping trip to Target in the community of Johns Creek, Georgia, near their gated community on March 9.

“Bobbi and Nick were in the music section and then all over the store,” the sources told HollywoodLife.com.

“Bobbi was kissing him on the mouth and holding hands. They were laughing and smiling and seemed SO happy.”

The eyewitnesses added: “She was wearing a black short pencil bandage skirt with a black top and black knee high boots. Her hair and makeup were all done too, like she was going to go out on the town. He was in all black – black jeans, black shirt, earrings and a black wide-brimmed hat.”

Even though Bobbi Kristina Brown and Nicholas Gordon wandered all around the store, they didn’t have a cart or anything with them and left in a silver SUV, the same one that’s usually seen outside their townhouse.

Earlier reports claimed that Bobbi Kristina was with Nick Gordon in Target, since he tweeted a photo of the two of them together later that afternoon in the same outfits our eyewitnesses saw and described.

Their close relationship has been going on for several months, and Bobbi Kristina and Nick Gordon’s tweets back and forth to each other prove it.

“Happy Birthday @REALbkBrown I love you,” Nick Gordon wrote to Bobbi Kristina on her birthday, March 4.

Nick Gordon was also protective of Bobbi Kristina, saying: “Thank you guys for all the birthday wishes for @REALbkBrown #NBL” and calling her his “baby sis” on December 11.

Meanwhile, Bobbi Kristina Brown tweeted a photo over the holidays with the caption: “Mom, @ndgordon (: & I on the way to the airport friday ! (:#NYCBABYYYYY<3 home home home.”

On November 24, Bobbi Kristina wrote: “I love sleeping with big brudder (: only person that helps my insomnia B!! Hah (: #teamfamilia!”

The same day, Bobbi Kristina suggestively tweeted: “Mmm @ndgordon An I.. Mmm can you say early risers ?(:”

In September 2011, Bobbi Kristina called Nick Gordon her “other half,” writing: “Home relaxing with othrhalf @ndgordon &maximus(: yaay. Sleep soon ! So tired, long week! #AlwaysHavingGOD in your heart « eternalblessings”

Clearly, Bobbi Kristina Brown and Nick Gordon have been in a deep relationship for quite some time – well before Whitney Houston’s tragic death last month.

There have been reports that members of Bobbi Kristina’s extended family – especially her grandma, Cissy Houston – doesn’t approve of Nick Gordon and wants him to move out of Whitney’s house and Bobbi Kristina’s life, even though he has lived there and has known her for 10 years.

Judging from the tweets and photos, Whitney Houston knew about this relationship and didn’t put a stop to it, letting Bobbi Kristina and Nick Gordon live under the same roof. Also, Nick Gordon wasn’t officially adopted by Whitney Houston. The singer just reportedly took him in as her own son and supported him. In fact, when Whitney Houston’s friends referred to her death, they reportedly said they were concerned about “her children,” meaning she considered Nick Gordon her son.