A Christmas guest

This was another freebie from Audible that I grabbed. I definitely did not notice what genre it came up under though and thought it was going to be a Christmasy story. 
The story follows a grandmother that is being sent away for Christmas, so the daughter (I think) and husband can go have fun elsewhere. It starts out with her being a real hag, so I had assumed the storyline would be ‘A Christmas Story'-esque, but nope! (But also still, kinda, yeah...) A night into her stay at the location she was sent to, there's a murder! This is actually a Christmas murder mystery. 
There are several vague and kind of loose references to someone else doing investigations, so I figured this was part of some kind of series. Otherwise it reads as it's own thing though. It's rather short and doesn't have much in the way of clues or investigation, but it is enjoyable. 
The major off thing to me, although it doesn't really matter, is the choice of a British man to do the audio narration seeing that the main character is an elderly woman. 
Personally a 3/5* for me. It's fine. Not bad. Free is free.