What Distinguishes a Stepsister from a Half-Sister?

A half-sister is someone who shares the same biological mother or father, whereas a stepsister is someone’s stepparent’s daughter. To qualify as a half-sister, a person must only have a single biological parent in common.

If two people get married and one of them has kids from a prior relationship, the kids will become the other’s stepkids. The kids don’t have any biological parents in common.

The new child, however, will become a half-sibling of the elder children from each parent’s prior relationship if those two married adults conceive a child together. The new baby is the half-sibling of the elder kids because they have a common parent.

Misha Khatri
Misha Khatri is an emeritus professor in the University of Notre Dame's Department of Chemistry and Biochemistry. He graduated from Northern Illinois University with a BSc in Chemistry and Mathematics and a PhD in Physical Analytical Chemistry from the University of Utah.


Please enter your comment!
Please enter your name here

Read More