PSA: Half-siblings and stepsiblings don't mean the same thing. A half-sibling shares one biological parent with you, and a step-sibling shares no biological parents with you.
If your stepfather has a baby with your mother, the kid is your half-sibling, not your stepsibling. The same goes for your stepmother and your father. It annoys me so much when people don't realize this, especially since I'm the eldest of a bunch of half-siblings and I have no full-siblings, but they're still my blood siblings, still my blood family.
This mistake shouldn't even be a mistake. It should be common sense.















