This is going to be a strange question, but, years ago I saw a play that was a hilarious, spoof murder mystery. I dont remember the title, author, or even the name of the theater where I saw it! But, I loved the show and was hoping, by a long shot that someone would know of the show....it is about a murder novelist who goes to a haunted mansion retreat to write her mystery. Several other people arrive including her ex husband and..reporters? if I am remembering correctly. Everyone gets killed off by the maid and butler. Well, as vague as that is, does anyone know of a show like this? Thank you! 

Here are three that come to mind - they are all plays about doing a murder mystery play (a play within a play) : 

The Haunted Through Lounge and recessed Dining Nook at Farnsdale Castle by McGillvray and Zerlin : Very British

Drop Dead By Milmore and Van Zandt

Accomplice by Rupert Holmes