Merry Lover by Mary Lancaster

Home alone with a tragic mystery on Christmas Eve.
God rest ye merry, gentlemen…
When she discovers a smiling corpse at her front door on Christmas Eve, Lady Grizelda Tizsa finds fresh meaning in the old carol. With her servants gone for the holiday, and her husband held up by snow storms in the north, she determines to discover how and why her smiling gentleman died where he did.
And who is responsible.
(Note: This story was first published as part of the Dragonblade Publishing Boxed set Star of Light, November 2021)