Murder Mystery 2 plunges the Spitz’s back into a major mystery, and the further insights into their lives have made the original movie's ending much sadder. Adam Sandler and Jennifer Aniston return as Nick and Audrey Spitz, who, after their successful mystery solving in Murder Mystery, have become detectives for hire. The opening of Murder Mystery 2 shows the Spitz’s skills do not quite live up to their previous accomplishments, as they wrongly accuse a man of cheating and are low on funds.
https://screenrant.com/murder-mystery-2-original-ending-sadder/