Conversation so far:
Did Nikki Sixx have a family?
Nikki Sixx was partially raised by his single mother, Deana Richards, and by his grandparents after his father left the family.
Is Nikki Sixx in contact with his mother, Deana Richards?
Nikki Sixx moved in with his grandparents after his mother abandoned him.
Did Nikki Sixx marry again?
One month after the divorce from Brandi Brandt, Nikki Sixx married his second wife, another Playboy Playmate, actress Donna D'Errico.
Did Nikki Sixx have any kids with Donna D'Errico?
Nikki Sixx and  Donna D'Errico have one daughter, Frankie-Jean Mary Sixx. D'Errico has a son, Rhyan Jacob, from a previous relationship.
Are Nikki Sixx and  Donna D'Errico still married?
Nikki Sixx and  Donna D'Errico separated shortly after their daughter's birth, and reconciled months later when Sixx completed rehab.
Did Nikki Sixx marry again after Donna D'Errico?
Nikki Sixx and Courtney Bingham married on March 15, 2014.
Are there any other interesting tidbits about Nikki Sixx's personal life?
In his autobiography, The Heroin Diaries: A Year in the Life of a Shattered Rock Star, Nikki Sixx described his toxic relationship with Matthews.
What does Nikki Sixx have to say about his toxic relationship with Denise Vanity Matthews?
Nikki Sixx said, Vanity came and went during different periods of my addiction. She was a wild black chick who had sung with Prince: she'd also been his lover for a while.“

Question: What was he addicted to?
Self-contained rewrite: What was Nikki Sixx addicted to?