Porter's family is also exploring their legal options after the memoir's release, a source close to the family tells PEOPLE

Singer Al B. Sure!, legally known as Albert Joseph Brown, is suspicious about the death of his ex, actress Kim Porter.

Kim Porter’s four children are speaking out, calling claims that their late mother wrote a memoir “simply untrue.” Christian (King) Combs and twins, D'Lila and Jessie Combs - whom Porter shares with Sean "Diddy" Combs - as well as Quincy Brown - whom she shares with Albert Joseph Brown (the R&B singer known as Al