Nina Williams is a terrible (written) character

She purely exists to be a femme fatale, hate Steve, and is more or less hellbent on ruining her sisters life for some pretty poorly written or flat out bad reasons.

Even when Anna had tried to fix things, Nina went "no lmao" and killed her fiance just for money.

That could have been a well written coming together storyline of them actually getting over things as they were for the entire series.

That and lastly being biased here, Anna deserves a lot better, and my own older sister is a less extreme Nina. Both are just petty as shit.