While I do think Heather comes off as a bit too tough, I do understand why she was mad at Beverly, and honestly, I'd probably have snapped at her too. As for the cake thing, for starters, if Unhinged Edward with his jaw that works sideways is going to get angry (is he ever not angry or annoyed?), then why give the recipe to Heather? I understand it's a team challenge, but let her fall on her own. Plus, was it exactly a tres leches cake? I didn't see that, which leads me to believe there was a simple basic cake recipe, but Heather tweaked it, adding her own stuff and touches. In which case, I can see why she'd take the win.