A step sibling is when two people share one parent ( two kids have same mother or dif father orrrr they have the same dad pr a different mother)
And dif father orrr they have the same dad and a different mother**
Step children are not blood related: 2 people with their own children from another relationship get married and their kids are now Step- siblings.. but half siblings means you share 1 of your parents *same mom or dad by blood.
These two are half-brothers because they are blood related by having the same fathers.
Guys this isn’t a step brother subplot, it’s half brother incest subplot.
Step brothers mean they don’t have the same father but if I remember right, they have the same father so this is just yucky