Indicates a family relationship through marriage, not by blood. After my mother remarried, I gained a stepson who is now like my own sibling.
Pro Tip 2/3
Non-biological Tie
Highlights that 'stepson' does not imply a genetic link or biological inheritance. Although he's my stepson, our bond is as strong as any biological parent and child.
Pro Tip 3/3
Potential Sensitivity
Use with care as the term could be sensitive; some may prefer to be called 'son'. My spouse insists on introducing me to others as his son, not his stepson.