Stepchild
A child who came with a partner — a young person now in your household by a route other than birth.
A stepchild in a dream is the dream's image of a young person now in your household by a route other than birth. The relationship is real and is not the relationship you were prepared for. The dream brings the stepchild when something in your life — a remarriage, a household merger, an informal adoption — has put you in the role of responsible adult to a child whose history predates you. A stepchild engaged with on the child's own terms is the dream affirming the honest care. A stepchild treated as if the previous history did not happen is the dream noting that the child arrived with a life already in progress, and the refusal to know it is being felt by the person whose life it is.