Conversation so far:
Did Walter Payton have a family?
Payton married Connie Norwood in 1976.
Did they have children?
The couple had two children.
Did the children play sports?
CANNOTANSWER.
What else was significant about his personal life?
A 2011 biography by Pearlman describes a tumultuous personal life very different from his positive public image.
Why was it tumultuous?
Payton was a consistent adulterer, and a multiple drug user.

Question: What kind of drugs?
Self-contained rewrite: What kind of drugs did payton use?