I may sound stupid but what exactly is a half-brother? I haven't read it yet Seeyiaa
'Step-siblings' means when children are not blood related but their parents are married to each other wherelse 'Half-siblings' means when children share one parent, for example, they can same father but different mothers or vice versa.
Not even stepbrothers—they are HALF BROTHERS. Σ(  ̄□ ̄||)