Rebecca's Dreams are the Key.

Old family trauma connects the living with the dead in a house of secrets, ghosts, and wrath.

Rebecca Cox loathes teaching but has run out of options and does not know what else to do. She cannot return home. When an opportunity to be the companion to a duke's daughter arises, she takes it. The offer comes from the handsome Lord Paul Rowntree; the two have spared before.

Paul prefers not to use his title. He desires recognition for his actions, as a soldier fighting against Napoleon or his work as a spy, not the connection to his family of birth. But his brother's ghost appears to inform him that his heir is coming to claim the title.

Paul's life is upended with constant responsibility and Rebecca is his solace. Their attraction is his only relief from interfering relations and his guardianship of the new duke. Paul faces off against his older sister who schemes to marry her daughter to the young duke to right her past failures.

Rebecca is haunted by her disappointments during her London season. She doesn't trust her attraction to Paul and dreams of running away. She most definitely doesn't want to marry him. However, since she cannot return home, she remains at the Rowanwood estate, where long-buried secrets carefully guarded by a ghost threaten to ruin the lives of everyone staying in the house.

CW: child abuse

Supernatural Affinity #2