It is irrational as to why Mary Cosby has a connection to Cosby’s family as he married Robert Cosby. Nevertheless, Mary is now a family member of a big Cosby family.
Mary Cosby’s partner Robert Cosby has four siblings, all of them have families of their own.
Every family member was surprised by the two marrying each other because of their significant age gap.
Mary and Robert live separately with their teenage son.