People usually tend to bring out their innermost thoughts and feelings when they lose control of themselves in the middle of their fit of pique.
In Bianca's case, all there's left to do is to pull the last straw. Winter has already been pushing her buttons for a while, considering all her recent failures that led up to Neil's crimes.
Now, it's only a matter of time before she finally loses it and spirals into insanity - if she hasn't already, that is.
Bianca had stolen and ruined a lot of things in her life. She persisted so long as she could. However, Winter would finally put an end to that. If it means dragging her down and stopping her, she will confront her no matter what the risks are.
'Tonight is that night...' Winter thought as she made her way to the lounge, looking for any sign of Bianca.
'I'll make sure that you're not going to continue the way you do things, Bianca.'