What do you think about this? Recently Whitney Houston's daughter, Bobbi Kristina announced that she was dating her 'adopted brother' on Twitter.

The 19-year-old her 'big brother' Nick Gordon went to Twitter to make it official that the two have been dating.

The fact is they are not true blood relatives; a source told E! Online: "the two of them met when they were younger, and Nick was going to enlist in the Army after high school to escape his family problems. According to our source, Bobbi Kristina told Whitney about Nick's plans and expressed that she didn't want him to go, so Whitney agreed to take Nick in as her own."