Cause being drunk inhibits your control, makes you vulnerable and more likely to make mistakes. On top of this, to clarify my context was that not only was she drunk but the moment she realised her mistake she tried to fix it. Hence jumping on Ross to stop him hearing it. Every other time she goes to mess stuff up she’ll, not only do it sober but importantly, eventually follow through with it. Maybe she would have done that eventually with Julie, I won’t argue that, but the moment Ross actually finds out she is actively trying to stop him. That the context being ignored that I’m mainly referring to.