It was Helen that turned it nasty n thought it had to lead to violence
 

It was Helen that turned it nasty even though she tried to appear calm and like she was being the clever one.I think most heard her raising her voice and talking aggressively back.

She also said that someone as small as Nikki shouldn't be giving it the big speech.In other words she thinks that arguments have to lead to scrapping otherwise why say a small person can't argue with her.

The clear implication was there that Nikki isn't big enough or hard enough to take her on so therefore shouldn't be making big speeches to her.