Trinity, in case you’re confused, is not my sister. She is my half-sister. This happens when your parents split up and either your mom or your dad has another kid…with a different spouse. They don’t have to be married, but it would make it a lot more sense if they did. A step-brother happens when your mother or father marries someone that already has a kid. That kid is now your step-sibling, whether you like it or not. Tyler is a perfect example of this:

I also have a few more pictures of Trinity: