stepniecesstepnephews
Stepniece and stepnephew are terms used to describe the children of one's stepchild. If an individual has a stepchild, and that stepchild subsequently has a child of their own, that child is considered the stepniece or stepnephew of the individual. These relationships are created through marriage or remarriage, rather than biological ties.
For example, if a person marries someone who already has a child, that child becomes their stepchild.
The term "stepniece" refers to a female stepchild of one's child, and "stepnephew" refers to a male