Black and Silver by Merry Farmer

When a goth beauty and a sunny silver fox find themselves waylaid on a road trip with only one bed, anything could happen.

Lady Minerva Llewellyn has always been fascinated by death and the darker side of life, and when her parents attempt to force her into a marriage she does not want, she turns to the depths of her imagination to hatch a plot to fake her own death so she can escape to Sweden to begin a new life.
There’s only one problem…Lord Lawrence Godwin.
Lawrence is a brilliant artist with a sunny disposition…and the Curse of Godwin Castle hanging over his head. When he offers to escort Minnie from London to Wales, he has no idea what sort of mayhem is in store. He likes Minnie immediately, and they get along brilliantly, but that only makes Lawrence want to hide his silly little secret from her even more.