The Silent Companions by Laura Purcell
When Elsie married handsome young heir Rupert Bainbridge, she believed she was destined for a life of luxury. But with her husband dead just weeks after their marriage, her new servants resentful, and the local villagers actively hostile, Elsie has only her husband's awkward cousin for company. Or so she thinks. Inside her new home lies a locked door, beyond which is a painted wooden figure--a silent companion--that bears a striking resemblance to Elsie herself.