Bobby Brown upset members of Whitney Houston’s family with his tribute to her late mom Cissy. Knewz.com can reveal Cissy “despised” the Every Little Step singer for getting her daughter hooked on drugs and she blames him for the superstar’s death.

Cissy Houston died at 91 on Oct. 7 in New Jersey where she was under hospice care for Alzheimer's disease. Her former son-in-law, Bobby Brown, paid tribute to her to PEOPLE on Monday.

Bobby Brown is paying tribute to his late mother-in-law, Cissy Houston, following her death at 91. Brown, 55, married to Cissy’s late daughter, Whitney Houston, from 1992 to 2007. The New Edition star shared a joint statement with his wife, Alicia Etheredge-Brown, about Cissy’s passing on Monday.