I believe it, too. Well, this surely may be the 'swan song' for this particular plant but I just can't bring myself to hack it up and throw it away when it is still able to bloom. Two things will happen - either it will bloom again in November if the weather stays warm enough, or if it gets cold, it will stop blooming which will allow its wimpy soft-hearted owner
to give it the axe.
I have two more large white ones, and the humungous pink one just starting to break out into bloom, too . . .