The Wife in the Attic by Rose Lerner

Goldengrove’s towers and twisted chimneys rose at the very edge of the peaceful Weald, a stone’s throw from the poisonous marshes and merciless waters of Rye Bay. Young Tabby Palethorp had been running wild there, ever since her mother grew too ill to leave her room. I was the perfect choice to give Tabby a good English education: thoroughly respectable and far too plain to tempt her lonely father, Sir Kit, to indiscretion. I knew better than to trust my new employer with the truth about my past. But knowing better couldn’t stop me from yearning for impossible things: to be Tabby’s mother, Sir Kit’s companion, Goldengrove’s new mistress. All that belonged to poor Lady Palethorp. Most of all, I burned to finally catch a glimpse of her. Surely she could tell me who had viciously defaced the exquisite guitar in the music room, why all the doors in the house were locked after dark, and whose footsteps I heard in the night…