There was a line in a movie.."stella, that nightgown is very flammable" what is the movei?

From an old movie about one mean sister and one weak sister...mean sister was approaching weak sister with a lighted match threatening to set fire to her nightgown

Wouldn't be "A Streetcar Named Desire" by any chance...

Actually I just found out that the movie is most likely "What Ever Happened to Baby Jane?" http://answers.yahoo.com/question/accuse_write?qid=20080120061213AAGpisT&kid=FpcuWzHoVTVWxAhq24T54WeglLGicLts3K3gfRbDxQ.FxEKEkRtR&s=comm&date=2008-02-19+16%3A57%3A31&.crumb=

I would have guessed "Streetcar" too, because of the name Stella, but your description sounds more "Hush, Hush Sweet Charlotte" with Bette Davis and Joan Crawford.