Will my stepmom’s son still be my stepbrother if she was divorced?

Let’s say if my stepmom divorced my dad, will that still be my stepmom and will her son still be my stepbrother if she was divorced? Also, if my uncle was divorced to my aunt (my mom’s sister), will he still be related to me? Will this affect my relationship with them? Will my brother also still be my uncle’s nephew if he was divorced to my aunt?