"Fire and Ice" by Delta (delta@nym.alias.net).
http://x10.dejanews.com/getdoc.xp?AN=343810955

The narrator, who writes erotic short stories, receives an anonymous e-mail message asking him to meet "Jeanne" on April 1. He knows only one person by that name, but since he has not seen her in a very long time and since he writes under a pseudonym, he doesn't really know whether this request is a genuine invitation or some sort of April Fool's prank.

They are to meet at a place called the Fire on Ice; and during the interim he reminisces about the Fire and Ice of their relationship. What will happen? Will it be the tiger or the lady who comes through the door? Will the relationship spring back to life or will it be all over? There are some things I'm just not going to tell you in this review.

This is a very good story.