Via People:

…A relative of Brown’s says the problems started last fall. “The relationship just spiraled out of control,” the relative tells PEOPLE in its new issue. “They fought like cats and dogs. They would fight about what to eat for dinner, about who wasn’t cleaning out the dishwasher. Stupid things. But they were always yelling.”…

….Then things took a more serious turn in March when Brown’s sister Tina told The National Enquirer that Houston was a drug addict. (Although Houston has never publicly addressed the Enquirer story, she most recently underwent rehab in April 2005; Brown did the same in 2000.)…