[Binbin]

It seems that Isabelle is rat-arsed most of the time, and that is why she has coped so well in the house. She was on her way out before she discovered the medicinal uses of excessive drinking. It seems to be a form of coasting to me because it helps her to act like everybody's favourite emotional victim - others, like Tom, have been there longer and handled more of the aggro, plus when he drinks you know it because he looks like a tit.