It sounds like Denise and her sister had a big blow-out that might take a bit of time before it resolves. Things can get pretty heated with sisters sometimes, lots of childhood issues can rear their ugly heads. My sister I me get along fairly well now, but not very close and since we live on opposite sides of the country, there's not much contact, except by phone. But even so, we can still lock horns and I have to make a big effort to bite my lip sometimes. I'm sure if we had to live together we'd drive each other nuts.