From the Daily Mail:

Whitney Houston’s family have been feuding ever since she passed away in 2012.

And now it seems things have escalated to new heights with reports emerging that the singer’s son-in-law, Nick Gordon, got into a physical fight with Whitney’s nephew, Gary Michael Houston.

According to TMZ, Gary attacked Bobbi Kristina’s husband by slamming him to the floor and punching his face because he felt Nick has been speaking ill of the family.

The incident is thought to have taken place at a Sweet 16 party for Whitney’s niece, Rayah, which was a formal affair that saw attendees dressed up in tuxes and long gowns.

The source told TMZ that instead Nick arrived in a hoodie and knit cap, ‘lookin’ like a thug.’ At the end of the party, Gary reportedly went straight after Nick.

It’s thought that Nick was unable to fight back, but he has since taken to Twitter to write a series of angry tweets about Gary and Whitney’s sister, Patricia Houston.

By the way, Bobbi Kristina’s father Bobby Brown apparently didn’t even know the two got married: