Sara laughed when G-d told her she was going to have a baby at age 90!
Or did she?
She denies it!
And who's asking, anyway?
It's hard to tell. The concluding verses of the opening scene of Vayera, in which three wayfarers drop in to see Avraham, interrupting his visit from G-d, and informing him, by the way, that he, at the age of 100, is going to be a father, raise many questions
Who said what to whom and why?